DE4419691C1 - Straight FRP bar for longitudinal load transmission - Google Patents

Straight FRP bar for longitudinal load transmission

Info

Publication number
DE4419691C1
DE4419691C1 DE4419691A DE4419691A DE4419691C1 DE 4419691 C1 DE4419691 C1 DE 4419691C1 DE 4419691 A DE4419691 A DE 4419691A DE 4419691 A DE4419691 A DE 4419691A DE 4419691 C1 DE4419691 C1 DE 4419691C1
Authority
DE
Germany
Prior art keywords
rods
sleeve
rod
fibers
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE4419691A
Other languages
German (de)
Inventor
Rainer Dr Schuetze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR filed Critical Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR
Priority to DE4419691A priority Critical patent/DE4419691C1/en
Priority to GB9509053A priority patent/GB2289928B/en
Priority to FR9506450A priority patent/FR2720795B1/en
Application granted granted Critical
Publication of DE4419691C1 publication Critical patent/DE4419691C1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • F16C7/026—Constructions of connecting-rods with constant length made of fibre reinforced resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5028—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being textile in woven or non-woven form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5042—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like covering both elements to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/526—Joining bars
    • B29C66/5261—Joining bars for forming coaxial connections, i.e. the bars to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/63—Internally supporting the article during joining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
    • B29C70/228—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being stacked in parallel layers with fibres of adjacent layers crossing at substantial angles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • B29C65/50—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like
    • B29C65/5007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like
    • B29C65/5021—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding using adhesive tape, e.g. thermoplastic tape; using threads or the like characterised by the structure of said adhesive tape, threads or the like being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/721—Fibre-reinforced materials
    • B29C66/7212—Fibre-reinforced materials characterised by the composition of the fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0809—Fabrics
    • B29K2105/0827—Braided fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
    • B29K2105/101—Oriented
    • B29K2105/108—Oriented arranged in parallel planes and crossing at substantial angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/08—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/06—Rods, e.g. connecting rods, rails, stakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
    • F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/40—Weight reduction

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)

Abstract

Thin-walled fibre composite rods 4, 6 are interconnected coaxially by a thin-walled fibre-composite sleeve 16 adhered thereto, the sleeve having an axial slit and comprising an inner layer 20 of unidirectional fibres, a layer thereover of unidirectional fibres which extend at an angle greater than 20 DEG to the rod axis, and an outer fibrous woven tube 18 laminated over the sleeve 16 and the adjacent regions of rods 4, 6. The rigidity of inner layer 20 substantially corresponds to that of the fibre layer of rods 4, 6. The sleeve may be produced by removing foamed core material 8 from a length of rod, cutting the axial slit, and bending the sleeve 16 open so that the inner layer 20 breaks in the region opposite the axial slit. Alternatively, the rods 4, 6 may be wound or pultruded, and the inner layer 20 may be a fibrous braided tube with the fibres at less than 15 DEG to the rod axis. <IMAGE>

Description

Die Erfindung bezieht sich auf einen Längskräfte übertragenden geraden Stab, der aus zwei oder mehreren koaxialen Teilstäben zusammengesetzt sind, die jeweils stumpf gegeneinander stoßend über eine Muffe verbunden sind.The invention relates to a straight rod that transmits longitudinal forces two or more coaxial partial rods are composed, each blunt butting against each other are connected by a sleeve.

Aus der DE 18 71 814 U1 ist es bekannt, koaxiale Metallrohre stumpf gegeneinander stoßend durch eine auf die glatten Rohrenden aufgeschobene und die Stoßstelle über­ greifende Muffe zu verbinden, die mit den Rohrenden durch Klebung verbunden ist. Bei Kupferleitungen ist es bekannt, die Verbindung zwischen den Rohrenden und der Muffe durch Lötung herzustellen.From DE 18 71 814 U1 it is known to blunt coaxial metal tubes against each other butting through one pushed onto the smooth pipe ends and over the joint to connect gripping sleeve, which is connected to the pipe ends by gluing. At Copper pipes are known to be the connection between the pipe ends and the sleeve made by soldering.

Aus der DE 38 18 066 A1 ist es bekannt, Rohre aus Kohlenstoff oder Graphit koaxial mit einer durch Klebung zu verbinden. Die Rohre sind dabei stirnseitig mit ineinander grei­ fenden Konen versehen und an den Konusflächen miteinander verklebt. Über dem außen liegenden Ende des Konusspaltes ist eine mit einem Thermoplasten imprägnierte Man­ schette aus Kohlenstoffasern gezogen. Die Manschette ist dabei vorzugsweise auf die Rohre gewickelt.From DE 38 18 066 A1 it is known to coaxially use tubes made of carbon or graphite one to connect by gluing. The tubes are interlocking on the front fenden cones and glued together on the cone surfaces. Over the outside the end of the conical gap is a Man impregnated with a thermoplastic cuff drawn from carbon fibers. The cuff is preferably on the Pipes wrapped.

Aus der DE 23 26 628 A1 ist eine Kupplung aus verklebten Muffenschalen für Rohre und rohrförmige Glieder bekannt. Die aneinander liegenden Kantenteile der starr ausgebil­ deten Muffenschalen sind so ausgebildet, daß sie sich überlappen, um die Haftfläche der Verbindungsstelle zu vergrößern.From DE 23 26 628 A1 is a coupling made of glued socket shells for pipes and tubular members known. The adjacent edge parts of the rigidly trained Deten socket shells are designed so that they overlap to the adhesive surface of the To enlarge the connection point.

Stäbe hoher Biegefestigkeit aus Faserverbundwerkstoffen mit einer dünnen Wandung sind ideale Werkstoffe für Leichtbaukonstruktionen, insbesondere in der Luft- und Raum­ fahrt. Mit solchen Stäben lassen sich beispielsweise räumliche Fachwerke mit geringem Gewicht herstellen, wie sie in der DE 43 30 857 A1 beschrieben sind. In der Luft- und Raumfahrt sind solche Träger mit großen Längen, beispielsweise Längen über 10 m, gefordert. Stäbe solcher Länge mit Durchmessern in der Größenordnung von 20 mm lassen sich nur mit großem apparativem Aufwand einstückig herstellen. Ein Problem ist dabei insbesondere die Aushärtung in der erforderlichen geradlinigen Lage. Kürzere Stäbe mit Längen bis 6 m lassen sich mit der geforderten hohen Genauigkeit günstig herstellen. Solche Stäbe sind bei Tragwerken großer Länge nur einsetzbar, wenn sie mit geringen Steifigkeitssprüngen zu Stäben größerer Länge zusammengesetzt werden können. Die Verbindung von Stäben kürzerer Länge zu Stäben größerer Länge kann beispielsweise auch bei der Herstellung von Fachwerkträgern zu fertigungstechnischen Vorteilen führen.Rods of high flexural strength made of fiber composite materials with a thin wall are ideal materials for lightweight constructions, especially in air and space journey. With such bars, for example, spatial trusses with little Produce weight as described in DE 43 30 857 A1. In the air and Aerospace are carriers of great length, for example lengths over 10 m, required. Bars of this length with diameters in the order of 20 mm can only be produced in one piece with great expenditure on equipment. Is a problem in particular the curing in the required straight-line position. Shorter Bars with lengths of up to 6 m can be inexpensively and with the required high accuracy produce. Such rods can only be used in structures of great length if they are with small jumps in stiffness can be assembled into rods of greater length  can. The connection of bars of shorter length to bars of longer length can for example, also in the manufacture of truss girders for manufacturing technology Advantages.

Aufgabe der Erfindung ist es, einen Weg aufzuzeigen, Einzelstäbe aus Faserverbund­ werkstoffen mit hoher Biegesteifigkeit und dünner Wandung auf einfache Weise zu Stäben großer Länge über eine Muffenverbindung ohne wesentliche Steifigkeitssprünge zusammenzusetzen.The object of the invention is to show a way, individual rods made of fiber composite materials with high bending stiffness and thin walls in a simple way Long rods over a socket connection without significant jumps in rigidity put together.

Diese Aufgabe wird gelöst durch eine Verbindung mit den Merkmalen des Kennzeichens des Patentanspruches 1.This problem is solved by a connection with the features of the license plate of claim 1.

Zweckmäßige Ausgestaltungen sind Gegenstand der Unteransprüche.Appropriate configurations are the subject of the subclaims.

Gemäß der Erfindung zusammengesetzte Stäbe können als Holmstäbe für Tragwerke großer Längserstreckung verwendet werden. Die Stäbe können aber auch in Zug- bzw. Druckkräfte übertragenden Betätigungsstangen Verwendung finden, in denen diese Stäbe durch entsprechende Lagerungen radial geführt und damit gegen Knickbean­ spruchungen gesichert sind.Rods composed according to the invention can be used as spar rods for structures large longitudinal extent can be used. However, the rods can also be pulled or Actuating rods transmitting pressure forces are used, in which these Rods are guided radially through appropriate bearings and thus against buckling beans spells are secured.

Die durch die Verbindung mögliche mehrteilige Ausbildung des Stabes kann auch Vor­ teile bei der Montage bieten. Bei einem Stab gemäß der Erfindung können die anzu­ schließenden Stabelemente beispielsweise auch Stabelemente sein, die an einem Ende mit Anschlußelementen konfektioniert sind. Solche mit Anschlußelementen konfektio­ nierte Stabelemente lassen sich beispielsweise in kürzeren Längen mit beidseitig ange­ ordneten Anschlußelementen quasi kontinuierlich herstellen - wie in DE 41 35 695 A1 beschrieben. Solche mit Anschlußelementen konfektionierten Stablängen können dann beispielsweise auch an ein mit den Quer- und Diagonalstäben konfektioniertes Tragwerk nachträglich angeschlossen werden.The multi-part design of the rod that is possible through the connection can also be used offer parts during assembly. In a rod according to the invention, the to closing rod elements, for example, also be rod elements at one end are assembled with connection elements. Such with connection elements confection nated rod elements can be attached on both sides in shorter lengths, for example order ordered connection elements quasi continuously - as in DE 41 35 695 A1 described. Such rod lengths assembled with connection elements can then for example, also on a structure assembled with the cross and diagonal bars can be connected later.

Mit Verbindungen gemäß der Erfindung lassen sich auch Teilsektionen solcher Trag­ werke miteinander verbinden, wodurch bei Tragwerken großer Längserstreckung Mon­ tageerleichterungen erwartet werden können. Dieses kann auch dann ein Vorteil sein, wenn hinsichtlich der Fertigung von Stäben großer Länge keine Probleme bestehen.With sections according to the invention, subsections of such supports can also be made connecting the works with each other, whereby Mon day relief can be expected. This can also be an advantage when there are no problems with the manufacture of large length bars.

Die Erfindung ist in der Zeichnung beispielsweise veranschaulicht und im nachstehenden im einzelnen anhand der Zeichnung beschrieben.The invention is illustrated in the drawing for example and in the following described in detail with reference to the drawing.

Fig. 1 zeigt im Längsschnitt eine Verbindung zwischen zwei Teilstäben mittels einer äußeren Verbindungshülse. Fig. 1 shows in longitudinal section a connection between two partial bars by means of an outer connecting sleeve.

Fig. 2 zeigt eine Verbindungshülse in Seitenansicht. Fig. 2 shows a connecting sleeve in side view.

Fig. 3 zeigt die Verbindungshülse nach Fig. 2 von der linken Stirnseite her gesehen. Fig. 3 shows the connecting sleeve according to Fig. 2 seen from the left end face.

Fig. 4 zeigt die Verbindungshülse in einem für die Montage aufgeklappten Zustand. Fig. 4 shows the connecting sleeve in an open state for assembly.

Der in Fig. 1 dargestellte Stab ist aus zwei oder mehr koaxialen Teilstäben 4, 6 zusam­ mengesetzt, die hier als dünnwandige Stäbe dargestellt sind und stumpf gegeneinander stoßen verbunden sind. In Fig. 1 dargestellt ist eine Verbindung zwischen zwei koaxialen Teilstäben. Die Wandungen der Teilstäbe 4, 6 bestehen aus faserverstärkten Kunst­ stoffen. Als Faser können in bekannter Weise Glasfaser, Kohlenstoffaser oder hochfeste Kunststoffaser verwendet werden. Sie sollen wenigstens eine Lage aus unidi­ rektionalen Fasern aufweisen, die sich parallel zur Achse 10 des Stabes erstrecken und die Zug- und Druckkräfte aufnehmen. Diese Lage unidirektionaler Fasern ist abgedeckt durch eine Faserlage mit sich unter einem Winkel zur Achse 10 kreuzenden Fasern vorzugsweise mit einem Winkel größer 20° zur Stabachse 10. Beide Faserlagen, für die auch unterschiedliche Fasern verwendet werden können, sind in eine Kunstharzmatrix eingebettet und bilden zusam­ men in Faserverbundbauweise den rohrförmigen Stabkörper 12. Die rohrförmige Wandung liegt bei dem dargestellten Ausführungsbei­ spiel in bekannter Weise auf einem drucksteifen Schaumstoffkern auf, der so ausgebildet ist, daß er in Querrichtung zur Achse 10 eine hohe Formstabilität aufweist.The rod shown in FIG. 1 is composed of two or more coaxial partial rods 4 , 6 , which are shown here as thin-walled rods and are butt-jointed. In Fig. 1 a connection between two coaxial part rods. The walls of the rods 4 , 6 are made of fiber-reinforced plastic. Glass fiber, carbon fiber or high-strength plastic fiber can be used in a known manner. You should have at least one layer of unidirectional fibers that extend parallel to the axis 10 of the rod and absorb the tensile and compressive forces. This layer of unidirectional fibers is covered by a fiber layer with fibers crossing at an angle to the axis 10, preferably at an angle greater than 20 ° to the rod axis 10 . Both fiber layers, for which different fibers can also be used, are embedded in a synthetic resin matrix and together form the tubular rod body 12 in fiber composite construction. The tubular wall lies in the game Ausführungsbei shown in a known manner on a rigid foam core, which is designed so that it has a high dimensional stability in the transverse direction to the axis 10 .

Die Stäbe können aber auch ohne Kern ausgebildet und beispiels­ weise in bekannter Wickeltechnik oder auch als pultrodierte Rohre hergestellt sein. Die die Längskräfte übertragenden Fasern können auch die Fasern eines Fasergeflechtschlauches sein, der mit großer Streckung mit einem Winkel der Fasern kleiner ± 15° zur Stab­ achse angeordnet ist.The rods can also be designed without a core and for example as in known winding technology or as pultruded tubes be made. The fibers transmitting the longitudinal forces can also be the fibers of a braided fiber hose, which with large Extension with an angle of the fibers less than ± 15 ° to the rod axis is arranged.

An der Verbindungsstelle sind die beiden Teilstäbe 4 und 6 vor­ zugsweise quer zu ihrer Achse 10 durchgetrennt. Sie können mit ihren Stirnseiten 14 gegeneinander anliegen. Vorzugsweise ist je­ doch ein Abstand vorgesehen.At the juncture, the two partial bars 4 and 6 are severed before preferably transversely to their axis 10 . They can rest against one another with their end faces 14 . A distance is preferably provided, however.

Zur Verbindung der beiden Teilstäbe 4, 6 ist eine Verbindungshülse 16 vorgesehen, die die beiden Teilstäbe außen umschließt und im Bereich der Verbindung aufliegt und mit der Außenseite der zu verbindenden Teilstäbe verklebt ist. Die Länge der Verbindungs­ hülse ist so gewählt, daß die Stabenden jeweils über einen Bereich L von wenigstens 2D übergriffen werden. Über der Verbindungshülse 16 ist ein Fasergewebeschlauch 18 auflaminiert, der vorzugsweise aus Kohlefasern besteht und in einer Kunstharzmatrix eingebettet ist. Dieser Schlauch steht über die Enden der Verbindungshülse jeweils über eine Länge L vor. In diesem Bereich ist der Faserge­ flechtschlauch 18 auf der Außenseite der Teilstäbe auflaminiert. To connect the two partial bars 4 , 6 , a connecting sleeve 16 is provided which surrounds the two partial bars on the outside and rests in the area of the connection and is glued to the outside of the partial bars to be connected. The length of the connecting sleeve is chosen so that the rod ends are overlapped over an area L of at least 2D. A fiber fabric tube 18 , which preferably consists of carbon fibers and is embedded in a synthetic resin matrix, is laminated over the connecting sleeve 16 . This hose protrudes over the ends of the connecting sleeve over a length L. In this area, the fiber braid hose 18 is laminated on the outside of the partial rods.

Die Verbindungshülse 16 ist ein Faserverbundelement mit einer in­ neren Schicht 20 aus achsparallelen unidirektionalen Fasern und einer darüber angeordneten Schicht 22 aus einem Fasergeflecht, beispielsweise einem Fasergewebeschlauch aus Glasfasern. Als Aus­ gang der Herstellung der Verbindungshülse 16 kann ein Stab mit einem druckfesten Schaumstoffkern und darauf angeordnet den beiden genannten Faserlagen in Faserverbundtechnik hergestellt werden. Von einem solchen Stab können dann Längen entsprechend der ge­ forderten Länge der Verbindungshülse abgetrennt werden. Aus diesen Stababschnitten wird dann der Schaumstoffkern 8 ausgeräumt. Die dabei gebildete rohrförmige Hülse wird längs einer achsparallelen Mantellinie 24 aufgetrennt, dann um wenigstens 90°, vorzugsweise aber um 180° wie in Fig. 4 dargestellt, aufgebogen. Sie bricht dabei in der Schicht der unidirektionalen Fasern im wesentlichen gegenüber dem Trennschnitt 24. Die beiden Teile bleiben durch die äußere Gewebeschicht 22 scharnierartig verbunden. Die Lage des Bruches und damit der scharnierartigen Verbindung ist unkritisch. Es können auch mehrere Brüche vorgesehen oder toleriert werden. Für den Zusammenhalt der unidirektionalen Fasern kann statt eines Gewebeschlauches auch eine Umfangswicklung vorgesehen werden.The connecting sleeve 16 is a fiber composite element with an inner layer 20 made of axially parallel unidirectional fibers and an overlying layer 22 made of a fiber braid, for example a fiber fabric tube made of glass fibers. As a starting point from the production of the connecting sleeve 16 , a rod with a pressure-resistant foam core and arranged thereon the two fiber layers mentioned can be produced using fiber composite technology. From such a rod lengths can then be separated according to the required length of the connecting sleeve. The foam core 8 is then removed from these rod sections. The tubular sleeve thus formed is cut along an axially parallel surface line 24 , then bent by at least 90 °, but preferably by 180 °, as shown in FIG. 4. It breaks in the layer of unidirectional fibers essentially in relation to the separating cut 24 . The two parts remain connected in a hinge-like manner by the outer fabric layer 22 . The location of the break and thus the hinge-like connection is not critical. Several breaks can also be provided or tolerated. To hold the unidirectional fibers together, a circumferential winding can also be provided instead of a fabric tube.

Die aufgebogene Verbindungshülse kann nach Auftragen von Klebstoff auf die Außenseite der beiden Teilstäbe 4, 6 und/oder die Innen­ seite der Verbindungshülse 16 auf die Teilstäbe aufgesetzt und wieder zu der rohrförmigen Ausgangsform zusammengebogen werden. Durch entsprechende Bemessung des Innendurchmessers der Verbin­ dungshülse läßt sich dabei eine angestrebte Klebstoffdicke ein halten. Die Verbindungshülse 16 ist so ausgebildet, daß die Festigkeit der unidirektionalen Fasern der Faserlage 20 der Längs­ festigkeit der beiden Teilstäbe 4, 6 im wesentlichen entspricht.The bent connecting sleeve can be placed on the outside of the two partial rods 4 , 6 and / or the inside of the connecting sleeve 16 on the partial rods after application of adhesive and bent back to the tubular starting shape. By appropriate dimensioning of the inner diameter of the connec tion sleeve, a desired adhesive thickness can be maintained. The connecting sleeve 16 is designed so that the strength of the unidirectional fibers of the fiber layer 20 of the longitudinal strength of the two partial bars 4 , 6 essentially corresponds.

Über die Verbindungshülse 16 wird dann ein vorher auf einen der Teilstäbe 4, 6 aufgeschobener Gewebeschlauchabschnitt 18 aus Fasern hoher Festigkeit, vorzugsweise Kohlenstoffasern, aufge­ schoben und auf die Außenseite der Verbindungshülse 16 und die angrenzenden Bereiche L′ der beiden Teilstäbe 4, 6 auflaminiert. About the connecting sleeve 16 is then a previously pushed onto one of the partial rods 4 , 6 fabric tube section 18 made of fibers of high strength, preferably carbon fibers, up and laminated onto the outside of the connecting sleeve 16 and the adjacent areas L 'of the two partial rods 4 , 6 .

Der auflaminierte Fasergewebeschlauch mildert Steifigkeitssprünge an den beiden Enden der Verbindungshülse.The laminated fiber fabric hose mitigates jumps in stiffness at the two ends of the connecting sleeve.

Verbindungshülsen wie sie in den Fig. 2 bis 4 dargestellt sind, lassen sich auch im Falle von Stabbeschädigungen zur Reparatur verwenden, wobei dann eine Verbindungshülse entsprechender Länge auf die geschädigten Abschnitte aufgebracht wird. Bei einer Reparatur kann ein stark beschädigter Abschnitt eines Stabes auch ausgetrennt und ein entsprechender Reparaturstab dann mittels zweier Verbindungshülsen in den beschädigten Stab eingefügt wer­ den. Dabei können dann auch entsprechende Gewebeschlauchabschnitte eingefügt und auflaminiert werden.Connecting sleeves as shown in FIGS . 2 to 4 can also be used for repairs in the event of rod damage, in which case a connecting sleeve of appropriate length is then applied to the damaged sections. During a repair, a severely damaged section of a rod can also be cut out and a corresponding repair rod can then be inserted into the damaged rod by means of two connecting sleeves. Corresponding fabric hose sections can then also be inserted and laminated on.

Eine weitere Möglichkeit der Stabverbindung ist in Fig. 5 und 6 dargestellt. Hier ist als Verbindungselement für die beiden Teil­ stäbe 4′, 6′ ein Verbindungsstab 26 vorgesehen, der in die Enden der beiden Teilstäbe 4′ und 6′ eingefügt ist. Dieser Verbindungs­ stab 26 weist wie die Stäbe 4′ und 6′ einen druckfesten Schaum­ stoffkern 28 und darüber eine Schicht achsparalleler unidirektio­ naler Fasern auf, über denen ein Fasergeflecht angeordnet ist, das hier aus Glasfasern bestehen kann. Die unidirektionalen Fasern und die Fasern des Fasergeflechtes sind in einer Kunstharzmatrix ein­ gebettet und bilden eine dünne starre rohrförmige Wandung 30. Der Anteil der unidirektionalen Fasern ist hierbei wiederum so ge­ wählt, daß die Längsfestigkeit und Biegesteifigkeit des Verbin­ dungsstabes 26 im wesentlichen der Längsfestigkeit und der Biege­ steifigkeit der beiden Teilstäbe 4′, 6′ entspricht.Another possibility of the rod connection is shown in FIGS . 5 and 6. Here is a connecting rod 26 is provided as a connecting element for the two part rods 4 ', 6 ', which is inserted into the ends of the two part rods 4 'and 6 '. This connecting rod 26 has like the rods 4 'and 6 ' a pressure-resistant foam core 28 and above a layer of axially parallel unidirectional fibers, over which a fiber network is arranged, which can consist of glass fibers here. The unidirectional fibers and the fibers of the fiber braid are embedded in a synthetic resin matrix and form a thin rigid tubular wall 30 . The proportion of unidirectional fibers is again selected so that the longitudinal strength and bending stiffness of the connecting rod 26 essentially corresponds to the longitudinal strength and the bending stiffness of the two partial bars 4 ', 6 '.

Zum Herstellen der Verbindung wird bei der Verbindung von Stäben mit Schaumstoffkern aus den beiden Teilstäben 4′, 6′ über eine Länge L, die der Eindringtiefe von wenigstens 2D des Verbindungs­ stabes entspricht, der Schaumstoffkern 8 ausgeräumt. In die aus­ geräumten Abschnitte wird dann Kleber mit einem gewissen Überschuß eingebracht, so daß beim Zusammensetzen der Stäbe durch den Ver­ bindungsstab 26, der durch den Schaumstoffkern 28 an seinen beiden Enden verschlossen ist, eine gewisse Harzmenge nach außen verdrängt wird und im Bereich der Enden 14 der beiden Teilstäbe 4′, 6′ austritt. Auf diese Weise wird im Eingriffsbereich vorhan­ dene Luft vollständig verdrängt, und es werden damit Lunker in der Klebeschicht vermieden. Auch hier ist vorzugsweise zwischen den angrenzenden Stirnseiten 14 der Teilstäbe 4′, 6′ ein geringer Abstand vorgesehen.To make the connection is in the connection of rods with foam core from the two partial rods 4 ', 6 ' over a length L, which corresponds to the penetration depth of at least 2D of the connecting rod, the foam core 8 cleared. Glue is then introduced into the cleared sections with a certain excess, so that when the rods are put together by the connecting rod 26 , which is closed by the foam core 28 at both ends, a certain amount of resin is displaced outwards and in the region of the ends 14 of the two rods 4 ', 6 ' emerges. In this way, existing air is completely displaced in the engagement area, and voids in the adhesive layer are thus avoided. Here too, a small distance is preferably provided between the adjacent end faces 14 of the partial rods 4 ', 6 '.

Auch über den Bereich der Verbindung nach Fig. 5 und 6 kann zur Verminderung der Steifigkeitssprünge außen auf die Enden der Teilstäbe 4′ und 6′ ein Fasergewebeschlauch - hier nicht dar­ gestellt - auflaminiert werden.Also over the area of the connection according to FIGS. 5 and 6, a fiber fabric hose - not shown here - can be laminated on to reduce the stiffness jumps outside on the ends of the partial rods 4 'and 6 '.

Bei Verwendung von Stäben ohne Kern, beispielsweise gewickelten oder pultrodierten rohrförmigen Stäben, kann eine lunkerfreie Klebung dadurch sichergestellt werden, daß die Teilstäbe 4′, 6′ in einem der Eindringtiefe L des Verbindungsstabes 26 entsprechenden Abstand vom Stabende verschlossen sind, beispielsweise dadurch, daß in die Stabenden in entsprechendem Abstand vom Stabende ein kurzer Stopfen oder dergleichen als Querwand eingesetzt ist. Auch der Verbindungsstab kann kernlos ausgebildet sein, muß dann aber an beiden Enden durch eine Querwand verschlossen sein.When using rods without a core, for example wound or pulverized tubular rods, a void-free gluing can be ensured in that the partial rods 4 ', 6 ' are closed at a distance from the rod end corresponding to the depth of penetration L of the connecting rod 26 , for example in that the rod ends a short plug or the like is used as a transverse wall at a corresponding distance from the rod end. The connecting rod can also be designed without a core, but must then be closed at both ends by a transverse wall.

Claims (3)

1. Längskräfte übertragender gerader Stab, der aus zwei oder mehreren koaxialen Teilstäben zusammengesetzt ist, die jeweils stumpf gegeneinander stoßend über eine Muffe verbunden sind, dadurch gekennzeichnet, daß
als Teilstäbe (4, 6; 4′, 6′) Stäbe hoher Biegesteifigkeit aus Faserverbundwerk­ stoffen mit einer dünnen Wandung vorgesehen sind,
an der Verbindungsstelle als Muffe außen eine dünnwandige längs einer achs­ parallelen Mantellinie (14) geschlitzte Verbindungshülse (16) aus Faserverbundwerk­ stoff aufgeklebt ist, die eine innere Lage (20) aus über den Umfang verteilten achs­ parallelen unidirektionalen Fasern aufweist, deren Steifigkeit im wesentlichen der Steifigkeit der Schicht der die Längskräfte übertragenden unidirektionalen Fasern der Teilkräfte entspricht und
die außen auf der inneren Lage aus unidirektionalen Fasern eine Faserwicklung mit sich zur Stabachse (10) unter einem Winkel größer 20° kreuzenden Fasern auf­ weist und
außen auf die Verbindungshülse (16) ein Fasergewebeschlauch (18) aus Fasern hoher Festigkeit in einer Kunstharzmatrix auflaminiert ist, der sich beidseitig über die Enden der Verbindungshülse (16) hinaus erstreckt und in den überstehenden Berei­ chen außen auf die Teilstäbe auflaminiert ist.1. Longitudinal force-transmitting straight rod, which is composed of two or more coaxial partial rods, each of which is butt-connected via a sleeve, characterized in that
as partial rods ( 4 , 6 ; 4 ', 6 ') rods of high flexural strength made of fiber composite materials with a thin wall are provided,
a thin-walled connecting sleeve ( 16 ) made of fiber composite material, which is slotted along an axially parallel surface line ( 14 ) and has an inner layer ( 20 ) of axially parallel unidirectional fibers distributed over the circumference, the stiffness of which is essentially that Stiffness of the layer of the unidirectional fibers transmitting the longitudinal forces corresponds to the partial forces and
the outside on the inner layer of unidirectional fibers has a fiber winding with fibers crossing to the rod axis ( 10 ) at an angle greater than 20 ° and
on the outside of the connecting sleeve ( 16 ), a fiber fabric hose ( 18 ) made of high-strength fibers is laminated in a synthetic resin matrix, which extends on both sides beyond the ends of the connecting sleeve ( 16 ) and is laminated onto the partial rods on the outside in the projecting areas. 2. Stab nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Verbindungshülse (16) eine Länge von wenigstens 4D der Teilstäbe aufweist.2. Rod according to claim 1 or 2, characterized in that the connecting sleeve ( 16 ) has a length of at least 4D of the partial rods. 3. Verfahren zur Herstellung einer Verbindungshülse für Stäbe nach Anspruch 1, dadurch gekennzeichnet, daß aus einem Stab mit einem druckfesten Schaumstoff­ kern mit einem Kerndurchmesser entsprechend dem Außendurchmesser der zu ver­ bindenden Teilstäbe (4, 6) und einer darauf liegenden dünnen Wandung aus einem Faserverbundwerkstoff mit einer auf dem Schaumstoffkern aufliegenden Schicht von achsparallelen unidirektionalen Fasern und einer äußeren Schicht mit sich unter einem Winkel größer 20° zur Stabachse kreuzenden Fasern der Schaumstoffkern entfernt und die Wandung der so gebildeten Hülse längs einer achsparallelen Mantellinie durchtrennt und die Hülse so aufgebogen wird, daß die unidirektionale Faserschicht (20) in dem der Trennung (24) gegenüberliegenden Bereich parallel zu den unidirek­ tionalen Fasern bricht.3. A method for producing a connecting sleeve for rods according to claim 1, characterized in that from a rod with a pressure-resistant foam core with a core diameter corresponding to the outer diameter of the partial rods to be ver ( 4 , 6 ) and a thin wall lying thereon made of a fiber composite material with a layer of axially parallel unidirectional fibers lying on the foam core and an outer layer with fibers crossing at an angle greater than 20 ° to the rod axis, the foam core is removed and the wall of the sleeve thus formed is cut along an axially parallel surface line and the sleeve is bent so that the unidirectional fiber layer ( 20 ) breaks in the area opposite the separation ( 24 ) parallel to the unidirectional fibers.
DE4419691A 1994-06-04 1994-06-04 Straight FRP bar for longitudinal load transmission Expired - Fee Related DE4419691C1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE4419691A DE4419691C1 (en) 1994-06-04 1994-06-04 Straight FRP bar for longitudinal load transmission
GB9509053A GB2289928B (en) 1994-06-04 1995-05-04 Fibre composite rods and production method
FR9506450A FR2720795B1 (en) 1994-06-04 1995-05-31 Straight bars for transmitting longitudinal forces based on reinforced composite materials.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4419691A DE4419691C1 (en) 1994-06-04 1994-06-04 Straight FRP bar for longitudinal load transmission

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DE4419691C1 true DE4419691C1 (en) 1995-08-24

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DE (1) DE4419691C1 (en)
FR (1) FR2720795B1 (en)
GB (1) GB2289928B (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0841490A2 (en) 1996-11-05 1998-05-13 Deutsches Zentrum für Luft- und Raumfahrt e.V. Device for force introduction
EP0774595A3 (en) * 1995-11-16 1998-07-29 The B.F. Goodrich Company Nested damping device with relative motion
EP0774596A3 (en) * 1995-11-16 1998-07-29 The B.F. Goodrich Company Brake rod having a bending mode coulomb damper
DE19703856A1 (en) * 1997-02-03 1998-08-06 Estebanez Eva Garcia Joint filling method for forming steel joints in heavy machines, e.g. cranes
DE19723112C1 (en) * 1997-06-03 1999-06-02 Ulrich Dipl Ing Rueger Connection element for a glued connection between two or more bars
DE19800911A1 (en) * 1998-01-14 1999-07-22 Deutsch Zentr Luft & Raumfahrt Process for producing a heavy-duty rod and the rod produced by the method
DE19958375A1 (en) * 1999-12-06 2001-06-21 Deutsch Zentr Luft & Raumfahrt System for transferring force, especially in aircraft construction, consists of tubes connected by coaxial sleeve, first tube being glued to sleeve and gap between second tube and sleeve containing pressure medium
WO2003042590A1 (en) * 2001-11-13 2003-05-22 Flowtite Technology As High-strength butt-wrap joint for reinforced plastic pipes
DE202004002838U1 (en) * 2004-02-20 2005-04-07 Hans Riedmayer E K Clip for preventing tensile rod or push rod from rotating, comprises forked head secured to clip part and to plastic insert for rod
DE202008008653U1 (en) 2008-06-24 2009-04-09 First Composites Gmbh Plastic multiprofile, in particular with a core
DE102010001479A1 (en) * 2010-02-02 2011-08-04 Rieter Ingolstadt GmbH, 85055 Thread guide rod for cross-wound bobbin manufactured textile machine, particularly open end spinning machine, has multiple tubular rod parts which are connected axially with each other by coupling elements
WO2011116967A1 (en) * 2010-03-26 2011-09-29 Messier-Bugatti-Dowty Method for producing a mechanical member from composite material, having an improved mechanical performance under traction-compression and bending
WO2012120064A1 (en) * 2011-03-10 2012-09-13 Sgl Carbon Se Method and device for producing a fiber-reinforced composite material, in particular a tension member
WO2014195866A1 (en) * 2013-06-05 2014-12-11 Hutchinson Composite connecting rod, method for producing same and aircraft ceiling or floor structure including same

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US20100132880A1 (en) * 2008-12-01 2010-06-03 Kevin Patrick Kelleher Composite honeycomb sandwich panel splicing
CN101565989B (en) * 2009-05-15 2011-04-06 同济大学 Method for coaxially connecting FRP reinforcements by FRP connecting pipe and expansive cement
GB2478768B (en) * 2010-03-18 2013-01-30 Marathon Belting Ltd A fibrous structure and a method of manufacturing same

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DE2326628A1 (en) * 1972-05-22 1973-12-06 Lockheed Aircraft Corp COUPLING MADE OF GLUED SLEEVES FOR TUBES AND TUBE-SHAPED LINKS
EP0016257B1 (en) * 1979-03-22 1982-03-03 Siemens Aktiengesellschaft Connector for assembling tubular frame works
DE3818066A1 (en) * 1988-05-27 1989-12-07 Sigri Gmbh ADHESIVE CONNECTION OF CARBON OR GRAPHITE TUBES
DE3447990C2 (en) * 1983-01-05 1990-06-28 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt Ev, 5300 Bonn, De Connecting element
DE4135695A1 (en) * 1991-10-25 1993-04-29 Deutsche Forsch Luft Raumfahrt ROD WITH A TUBULAR WALL OF FIBER COMPOSITE MATERIAL AND CONNECTING ELEMENT SIDED ON either side
DE4205834C1 (en) * 1992-02-26 1993-06-03 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.V., 5300 Bonn, De Framework of thin walled round fibre compound rods - has fibre compound joint plates connecting cross and diagonal bars to upright bars
DE4330857A1 (en) * 1992-09-17 1994-03-31 Deutsche Forsch Luft Raumfahrt Framework of round bars with thin walls reinforced by fibres

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DE2326628A1 (en) * 1972-05-22 1973-12-06 Lockheed Aircraft Corp COUPLING MADE OF GLUED SLEEVES FOR TUBES AND TUBE-SHAPED LINKS
EP0016257B1 (en) * 1979-03-22 1982-03-03 Siemens Aktiengesellschaft Connector for assembling tubular frame works
DE3447990C2 (en) * 1983-01-05 1990-06-28 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt Ev, 5300 Bonn, De Connecting element
DE3818066A1 (en) * 1988-05-27 1989-12-07 Sigri Gmbh ADHESIVE CONNECTION OF CARBON OR GRAPHITE TUBES
DE4135695A1 (en) * 1991-10-25 1993-04-29 Deutsche Forsch Luft Raumfahrt ROD WITH A TUBULAR WALL OF FIBER COMPOSITE MATERIAL AND CONNECTING ELEMENT SIDED ON either side
DE4205834C1 (en) * 1992-02-26 1993-06-03 Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt E.V., 5300 Bonn, De Framework of thin walled round fibre compound rods - has fibre compound joint plates connecting cross and diagonal bars to upright bars
DE4330857A1 (en) * 1992-09-17 1994-03-31 Deutsche Forsch Luft Raumfahrt Framework of round bars with thin walls reinforced by fibres

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0774595A3 (en) * 1995-11-16 1998-07-29 The B.F. Goodrich Company Nested damping device with relative motion
EP0774596A3 (en) * 1995-11-16 1998-07-29 The B.F. Goodrich Company Brake rod having a bending mode coulomb damper
US6241062B1 (en) 1995-11-16 2001-06-05 The B. F. Goodrich Company Nested damping device with relative motion
EP0841490A2 (en) 1996-11-05 1998-05-13 Deutsches Zentrum für Luft- und Raumfahrt e.V. Device for force introduction
DE19645467A1 (en) * 1996-11-05 1998-05-14 Deutsch Zentr Luft & Raumfahrt Force application device
DE19703856A1 (en) * 1997-02-03 1998-08-06 Estebanez Eva Garcia Joint filling method for forming steel joints in heavy machines, e.g. cranes
DE19723112C1 (en) * 1997-06-03 1999-06-02 Ulrich Dipl Ing Rueger Connection element for a glued connection between two or more bars
DE19800911A1 (en) * 1998-01-14 1999-07-22 Deutsch Zentr Luft & Raumfahrt Process for producing a heavy-duty rod and the rod produced by the method
DE19958375A1 (en) * 1999-12-06 2001-06-21 Deutsch Zentr Luft & Raumfahrt System for transferring force, especially in aircraft construction, consists of tubes connected by coaxial sleeve, first tube being glued to sleeve and gap between second tube and sleeve containing pressure medium
DE19958375C2 (en) * 1999-12-06 2003-04-03 Deutsch Zentr Luft & Raumfahrt Force transmission device and method for connecting incompatible materials
WO2003042590A1 (en) * 2001-11-13 2003-05-22 Flowtite Technology As High-strength butt-wrap joint for reinforced plastic pipes
DE202004002838U1 (en) * 2004-02-20 2005-04-07 Hans Riedmayer E K Clip for preventing tensile rod or push rod from rotating, comprises forked head secured to clip part and to plastic insert for rod
DE202008008653U1 (en) 2008-06-24 2009-04-09 First Composites Gmbh Plastic multiprofile, in particular with a core
DE102010001479A1 (en) * 2010-02-02 2011-08-04 Rieter Ingolstadt GmbH, 85055 Thread guide rod for cross-wound bobbin manufactured textile machine, particularly open end spinning machine, has multiple tubular rod parts which are connected axially with each other by coupling elements
WO2011116967A1 (en) * 2010-03-26 2011-09-29 Messier-Bugatti-Dowty Method for producing a mechanical member from composite material, having an improved mechanical performance under traction-compression and bending
FR2957844A1 (en) * 2010-03-26 2011-09-30 Messier Dowty Sa METHOD FOR MANUFACTURING A MECHANICAL MEMBER IN COMPOSITE MATERIAL HAVING INCREASED MECHANICAL TENSION-COMPRESSION AND BENDING
CN102844171A (en) * 2010-03-26 2012-12-26 梅西耶-布加蒂-道提公司 Method for producing a mechanical member from composite material, having an improved mechanical performance under traction-compression and bending
WO2012120064A1 (en) * 2011-03-10 2012-09-13 Sgl Carbon Se Method and device for producing a fiber-reinforced composite material, in particular a tension member
WO2014195866A1 (en) * 2013-06-05 2014-12-11 Hutchinson Composite connecting rod, method for producing same and aircraft ceiling or floor structure including same
FR3006725A1 (en) * 2013-06-05 2014-12-12 Hutchinson COMPOSITE ROD, ITS MANUFACTURING METHOD, AND AERONAUTICAL CEILING OR FLOOR STRUCTURE INCORPORATING IT.
US9902116B2 (en) 2013-06-05 2018-02-27 Hutchinson Composite connecting rod, method for manufacturing such a rod and aeronautic ceiling or floor structure incorporating same

Also Published As

Publication number Publication date
GB2289928B (en) 1998-06-24
GB9509053D0 (en) 1995-06-28
FR2720795A1 (en) 1995-12-08
FR2720795B1 (en) 1997-03-14
GB2289928A (en) 1995-12-06

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