CN102705686B - Composite foam sandwich bar - Google Patents
Composite foam sandwich bar Download PDFInfo
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- CN102705686B CN102705686B CN201210183266.5A CN201210183266A CN102705686B CN 102705686 B CN102705686 B CN 102705686B CN 201210183266 A CN201210183266 A CN 201210183266A CN 102705686 B CN102705686 B CN 102705686B
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- composite material
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- material tube
- tube
- core bar
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Abstract
The invention discloses a composite foam sandwich bar, and belongs to the field of new material structures. The composite foam sandwich bar comprises a composite tube, a foam filling material, a connection tube, a bolt shank, a nut, a load-bearing plate and wedge plate type hoop jackets, wherein the foam filling material takes a supporting effect on the wall of the composite tube so as to inhibit the composite tube from being pressed to cause local destabilization. The wedge plate type hoop jackets at ends of the composite tube can inhabit the end part of the composite tube from being layered and destroyed when the composite tube is pressed. The composite foam sandwich bar has the advantages of simple design structure, light weight, high bearing capacity and corrosion resistance, and can be applicable to bar system structures in fields of architectures, bridges, aerospace engineering and the like.
Description
Technical field
The present invention relates to a kind of composite material foam core bar, belong to field of new material structures, can be applicable in the structure of bar system in the fields such as building, Aero-Space, bridge works.
Background technique
The structure of bar system that the axially loaded of take is master is widely used in the longspan structure in the fields such as construction engineering, Aero-Space, mechanical engineering, as truss, rack and net shell etc.Conventionally this class formation is made by steel pipe, has the advantages such as firm in structure, weldability good, rigidity is large, but also has from the shortcoming such as great, perishable.And fiber reinforced resin based (Fibre-Reinforced Polymer, FRP) composite material tube, especially carbon fibre reinforced pipe (CarbonFibre-Reinforced Polymer, CFRP) have that intensity is high, the advantage such as little, corrosion-resistant of conducting oneself with dignity, can be used for super-span or weight is had to the structure of bar system of strict demand.
But, when carbon fibre reinforced pipe bears axial tension and compressive load, because composite material is at thickness and easily destroyed perpendicular to fiber direction, carbon fiber is stressed only has 1/3 of theoretical bearing capacity, there is too early pipe end section damage layer or tube wall crippling, the high-intensity performance of carbon fiber is not fully used.
Therefore, the present invention aim to provide a kind of design structure simple, conduct oneself with dignity little, can solve composite material tube and bear the structure that occurs too early end delamination failure and local destabilization problems while drawing the second month in a season or compressive load, improves the bearing capacity of composite material tube.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention is to provide the simple structure of bar system of a kind of design structure, when this structure tension second month in a season or compressive load, can solve conventional composite materials pipe and occur too early end delamination failure and local buckling's problem, improve the bearing capacity of composite material tube.
For achieving the above object, the invention provides a kind of composite material foam core bar, comprising:
Composite material tube;
Foam-filled thing, described foam-filled thing is placed in described composite material tube;
Connecting cylinder, described connecting cylinder is fixed in the end of described composite material tube;
Bolt shank, described bolt shank and described connecting cylinder are threaded connection;
Nut, described nut and described bolt shank are threaded connection;
Bearing plate, described bearing plate is anchored on the end face of described composite material tube by described nut and being threaded of described bolt shank;
At least two key formula cuffs, described key formula cuff forms by becoming internal diameter cylinder and four or more keies, by described key being wedged in the gap between described change internal diameter cylinder and described composite material tube, described change internal diameter cylinder is anchored on to described composite material tube end outside.
Preferably, described composite material tube is comprised of continuous carbon fibre laying and resin matrix.
Preferably, described composite material tube has a plurality of layings along pipe thickness direction, and wherein the fiber of at least one laying is arranged vertically, and the fiber direction of inner side laying is greater than 0 degree with circumferential angle.
Preferably, wherein said foam-filled thing consists of closed cell foam.
Preferably, described foam-filled thing is the plug that diameter is identical with described composite material bore.
Preferably, described connecting cylinder is fixed in composite material tube end by gluded joint.
Preferably, splay in described connecting cylinder termination, and minimal slope is 1/10.
Preferably, between described connecting cylinder and described bearing plate, there is a gap.
Preferably, described bearing plate contacts completely with described composite material end surfaces.
Preferably, described change internal diameter cylinder varied in thickness is identical with described key.
In the utility model, foam-filled thing plays a supportive role to composite material tube wall, suppress composite material tube pressurized local buckling, end delamination failure when the key formula cuff of composite material pipe end can suppress composite material tube pressurized, effectively improve the bearing capacity of hollow composite pipe under the effect of axle power, give full play to the performance that fiber longitudinal strength is high.The utility model is bearing while drawing Zhong Zaihe, and bolt shank is passed to connecting cylinder by pulling force, and connecting cylinder is passed to composite material tube.When bearing compressive load, bolt shank is passed to bearing plate by pressure, and bearing plate is passed to composite material tube.Hence one can see that, and separately, design structure is simple for pulling force and pressure bang path, and Path of Force Transfer is clear and definite, contributes to reduce the probability of composite material tube stress destruction, and bolt shank is easily connected with other rod member or node.
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object of the present invention, feature and effect.
Accompanying drawing explanation
Fig. 1 is the structural drawing of a preferred embodiment of the present invention.
Fig. 2 is the structural drawing of the connecting cylinder in a preferred embodiment of the present invention.
Fig. 3 is the left side view of the connecting cylinder in a preferred embodiment of the present invention.
Fig. 4 is the structural drawing of the key formula cuff in a preferred embodiment of the present invention.
Fig. 5 is the left side view of the key formula cuff in a preferred embodiment of the present invention.
Fig. 6 is the schematic diagram of the key in a preferred embodiment of the present invention.
Fig. 7 is the structural drawing of the change internal diameter cylinder in a preferred embodiment of the present invention.
Fig. 8 is the left side view of the change internal diameter cylinder in a preferred embodiment of the present invention.
Embodiment
The present invention is a kind of composite material foam core bar.
Fig. 1 to Fig. 8 is an embodiment of this composite material foam core bar, and it comprises composite material tube 1 and be placed in the closed cell foam tube core 2 in composite material tube 1, and connecting cylinder 3 is separately fixed in the end of composite material tube 1 by gluded joint 4; Bolt shank 5 is connected by internal whorl with connecting cylinder 3 respectively; Nut 6 is connected by internal whorl with bolt shank 5 respectively, bearing plate 7 is anchored on respectively to the two ends of composite material tube 1; At the two end part of composite material tube 1, there are respectively two pairs of key formula cuffs 8 to be anchored on composite material tube 1 outside; Key formula cuff 8 forms with four or more keies 11 by becoming internal diameter cylinder 10, and the varied in thickness of change internal diameter cylinder 10 is consistent with key 11 varied in thickness.
Composite material tube 1 is comprised of continuous carbon fibre laying and resin matrix, along pipe thickness direction, has a plurality of layings, and wherein the fiber of at least one laying is arranged vertically, and the fiber direction of inner side laying is greater than 0 degree with circumferential angle.
Before assembling composite material foam core bar, first taper is made to according to the boring size of connecting cylinder 3 in closed cell foam tube core 2 two ends, be then inserted into composite material tube 1, note guaranteeing closed cell foam tube core 2 and composite material tube 1 inwall close contact.
Connecting cylinder 3 is fixed in composite material tube 1 end by gluded joint 4, for improving described solvent cement joint semi-finals degree, reduces its peel stress, splays in connecting cylinder 3 terminations, and minimal slope is 1/10.
Between bearing plate 7 and connecting cylinder 3, a reserved gap 9, avoids bearing plate 7 that pressure is passed to connecting cylinder 3, causes that glue-line destroys.
When assembling composite material foam core bar, first key 11 is put into one by one and become internal diameter cylinder 10, then progressively knock key 11 fastening, guarantee key 11 and composite material tube 1 even contact.During fastening key 11, note firmly not excessively, prevent damaged composite material pipe 1.
More than describe preferred embodiment of the present invention in detail.The ordinary skill that should be appreciated that related domain just can design according to the present invention be made many modifications and variations without creative work.Therefore, all technician in the art, all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment.
Claims (7)
1. a composite material foam core bar, is characterized in that, comprising:
Composite material tube;
Foam-filled thing, described foam-filled thing is placed in described composite material tube;
Connecting cylinder, described connecting cylinder is fixed on by gluded joint in the end of described composite material tube, and splay in described connecting cylinder termination, and minimal slope is 1/10;
Bolt shank, described bolt shank and described connecting cylinder are threaded connection;
Nut, described nut and described bolt shank are threaded connection;
Bearing plate, described bearing plate is anchored on the end face of described composite material tube by described nut and being threaded of described bolt shank, between described connecting cylinder and described bearing plate, has a gap;
At least two key formula cuffs, described key formula cuff forms by becoming internal diameter cylinder and four or more keies, described change internal diameter cylinder varied in thickness is identical with described key, by described key being wedged in the gap between described change internal diameter cylinder and described composite material tube, described change internal diameter cylinder is anchored on to described composite material tube end outside.
2. composite material foam core bar as claimed in claim 1, wherein said composite material tube is comprised of continuous carbon fibre laying and resin matrix.
3. composite material foam core bar as claimed in claim 1 or 2, wherein said composite material tube has a plurality of layings along pipe thickness direction, and wherein the fiber of at least one laying is arranged vertically, and the fiber direction of inner side laying is greater than 0 degree with circumferential angle.
4. composite material foam core bar as claimed in claim 1, wherein said foam-filled thing consists of closed cell foam.
5. the composite material foam core bar as described in claim 1 or 4, wherein said foam-filled thing is the plug that diameter is identical with described composite material bore.
6. composite material foam core bar as claimed in claim 1, wherein.
7. composite material foam core bar as claimed in claim 1, wherein said bearing plate contacts completely with described composite material end surfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210183266.5A CN102705686B (en) | 2012-06-05 | 2012-06-05 | Composite foam sandwich bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210183266.5A CN102705686B (en) | 2012-06-05 | 2012-06-05 | Composite foam sandwich bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102705686A CN102705686A (en) | 2012-10-03 |
| CN102705686B true CN102705686B (en) | 2014-11-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210183266.5A Active CN102705686B (en) | 2012-06-05 | 2012-06-05 | Composite foam sandwich bar |
Country Status (1)
| Country | Link |
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| CN (1) | CN102705686B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225768B (en) * | 2016-05-19 | 2019-03-01 | 西华大学 | A kind of manufacture craft of the double-deck carbon fiber pipe with foam layer |
| CN108757794B (en) * | 2018-06-26 | 2020-09-25 | 哈尔滨工程大学 | Composite material tensile energy-absorbing member and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353268A (en) * | 1976-03-10 | 1982-10-12 | Avions Marcel Dassault-Breguet Aviation | Connecting rods |
| US4758458A (en) * | 1983-01-05 | 1988-07-19 | Deutsche Forschung- Und Versichsanstalt | Constructural elements of rod form |
| CN201335221Y (en) * | 2008-11-27 | 2009-10-28 | 武汉大禹阀门制造有限公司 | Socket-joint pipe connection component provided with wedge-shaped fastening pipe sleeve |
| CN201335191Y (en) * | 2008-11-27 | 2009-10-28 | 武汉大禹阀门制造有限公司 | Socket-joint flexible-seat gate valve provided with wedge-shaped fastening pipe sleeve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2343918A1 (en) * | 1976-03-10 | 1977-10-07 | Dassault Avions | Connecting rod for aircraft controls - has metal bushes bonded to conical ends of rods formed of carbon fibre embedded in synthetic resin |
-
2012
- 2012-06-05 CN CN201210183266.5A patent/CN102705686B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4353268A (en) * | 1976-03-10 | 1982-10-12 | Avions Marcel Dassault-Breguet Aviation | Connecting rods |
| US4758458A (en) * | 1983-01-05 | 1988-07-19 | Deutsche Forschung- Und Versichsanstalt | Constructural elements of rod form |
| CN201335221Y (en) * | 2008-11-27 | 2009-10-28 | 武汉大禹阀门制造有限公司 | Socket-joint pipe connection component provided with wedge-shaped fastening pipe sleeve |
| CN201335191Y (en) * | 2008-11-27 | 2009-10-28 | 武汉大禹阀门制造有限公司 | Socket-joint flexible-seat gate valve provided with wedge-shaped fastening pipe sleeve |
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| Publication number | Publication date |
|---|---|
| CN102705686A (en) | 2012-10-03 |
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