CN102705686A - Composite foam sandwich bar - Google Patents
Composite foam sandwich bar Download PDFInfo
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- CN102705686A CN102705686A CN2012101832665A CN201210183266A CN102705686A CN 102705686 A CN102705686 A CN 102705686A CN 2012101832665 A CN2012101832665 A CN 2012101832665A CN 201210183266 A CN201210183266 A CN 201210183266A CN 102705686 A CN102705686 A CN 102705686A
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- composite material
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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 to build, in the structure of bar system in field such as Aero-Space, bridge works.
Background technique
With the axially loaded is that main structure of bar system is widely used in the longspan structure in fields such as construction engineering, Aero-Space, mechanical engineering, like truss, rack and net shell etc.Usually this class formation is processed by steel pipe, has advantages such as firm in structure, that weldability good, rigidity is big, but also has from 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 intensity height, deadweight advantage such as little, corrosion-resistant, can be used for super-span or weight had the structure of bar system of strict demand.
But; When carbon fibre reinforced pipe bears axial tension and compressive load; Because composite material is prone to be destroyed at thickness with perpendicular to fiber direction; Graphite fiber is stressed to have only 1/3 of theoretical bearing capacity, has occurred pipe end section damage layer or tube wall crippling too early, makes the high-intensity performance of graphite fiber not be fully used.
Therefore, the present invention aims to provide that a kind of design structure is simple, deadweight is little, can solve composite material tube bears the structure that occurs end portion damage layer and local destabilization problems when drawing the second month in a season or compressive load too early, improves the bearing capacity of composite material tube.
Summary of the invention
Because the above-mentioned defective of existing technology; Technical problem to be solved by this invention provides the simple structure of bar system of a kind of design structure; When this structure is drawn the second month in a season or compressive load; Can solve the conventional composite materials pipe and occur end portion damage layer and local buckling's problem too early, improve the bearing capacity of composite material tube.
For realizing above-mentioned purpose, the invention provides a kind of composite material foam core bar, comprising:
Composite material tube;
Foam-filled thing, said foam-filled thing places in the said composite material tube;
Connecting cylinder, said connecting cylinder are fixed in the end of said composite material tube;
Bolt shank, said bolt shank and said connecting cylinder are through being threaded;
Nut, said nut and said bolt shank are through being threaded;
Bearing plate, said bearing plate is anchored on the end face of said composite material tube through said nut and being threaded of said bolt shank;
At least two key formula hoop covers; Said key formula hoop cover is formed by becoming internal diameter cylinder and four or more keies; Through said key being wedged in the gap between said change internal diameter cylinder and the said composite material tube, said change internal diameter cylinder is anchored on the said composite material tube end outside.
Preferably, said composite material tube is made up of with resin matrix continuous carbon fibre shop layer.
Preferably, said composite material tube has a plurality of shops layer along the pipe thickness direction, and wherein the fiber of at least one shop layer is arranged vertically, and the fiber direction of the most inboard shop layer and circumferential angle are greater than 0 degree.
Preferably, wherein said foam-filled thing is made up of closed cell foam.
Preferably, said foam-filled thing is diameter and the identical plug of said composite material bore.
Preferably, said connecting cylinder is fixed in the composite material tube end through gluded joint.
Preferably, splay in said connecting cylinder termination, and minimal slope is 1/10.
Preferably, between said connecting cylinder and the said bearing plate gap is arranged.
Preferably, said bearing plate contacts with said composite material tube end face fully.
Preferably, said change internal diameter cylinder varied in thickness is identical with said key.
Foam-filled thing plays a supportive role to the composite material tube wall among the present invention; Suppress composite material tube pressurized local buckling; End portion damage layer when the key formula hoop cover of composite material pipe end can suppress the composite material tube pressurized; Effectively improve the bearing capacity of hollow composite pipe under the effect of axle power, give full play to the high performance of fiber longitudinal strength.The present invention is bearing when drawing Zhong Zaihe, and bolt shank is passed to connecting cylinder with pulling force, and connecting cylinder is passed to composite material tube.When bearing compressive load, bolt shank is passed to bearing plate with pressure, and bearing plate is passed to composite material tube.Hence one can see that, and pulling force and propagation of pressure path separate, and design structure is simple, and Path of Force Transfer is clear and definite, helps to reduce the probability of composite material tube stress destruction, and bolt shank is connected with other rod member or node easily.
Below will combine accompanying drawing that the technique effect of design of the present invention, concrete structure and generation is described further, to understand the object of the invention, characteristic and effect fully.
Description of drawings
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 the preferred embodiment of the present invention.
Fig. 3 is the left side view of the connecting cylinder in the preferred embodiment of the present invention.
Fig. 4 is the structural drawing of the key formula hoop cover in the preferred embodiment of the present invention.
Fig. 5 is the left side view of the key formula hoop cover in the preferred embodiment of the present invention.
Fig. 6 is the schematic representation of the key in the preferred embodiment of the present invention.
Fig. 7 is the structural drawing of the change internal diameter cylinder in the preferred embodiment of the present invention.
Fig. 8 is the left side view of the change internal diameter cylinder in the 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 the closed cell foam tube core 2 that places in the composite material tube 1, and connecting cylinder 3 is separately fixed in the end of composite material tube 1 through gluded joint 4; Bolt shank 5 is connected through internal whorl with connecting cylinder 3 respectively; Nut 6 is connected through internal whorl with bolt shank 5 respectively, bearing plate 7 is anchored on the two ends of composite material tube 1 respectively; At the two end part of composite material tube 1, there are two pairs of key formula hoop covers 8 to be anchored on composite material tube 1 outside respectively; Key formula hoop cover 8 is formed 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.
Before assembling composite material foam core bar, earlier taper is processed according to the boring size of connecting cylinder 3 in closed cell foam tube core 2 two ends, be inserted into composite material tube 1 then, notice guaranteeing that closed cell foam tube core 2 closely contacts with composite material tube 1 inwall.
Connecting cylinder 3 is fixed in composite material tube 1 end through gluded joint 4, for improving said solvent cement joint semi-finals degree, reduces its peel stress, splays in connecting cylinder 3 terminations, and minimal slope is 1/10.
Reserve a gap 9 between bearing plate 7 and the connecting cylinder 3, avoid bearing plate 7 to give connecting cylinder 3, cause that glue-line destroys propagation of pressure.
When assembling composite material foam core bar, earlier key 11 is put into change internal diameter cylinder 10 one by one, it is fastening progressively to knock key 11 then, guarantees key 11 and composite material tube 1 even contact.Note firmly not excessively during fastening key 11, 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 need not creative work and just can design according to the present invention make many modifications and variation.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 through the available technological scheme of logical analysis, reasoning, or a limited experiment.
Claims (10)
1. a composite material foam core bar is characterized in that, comprising:
Composite material tube;
Foam-filled thing, said foam-filled thing places in the said composite material tube;
Connecting cylinder, said connecting cylinder are fixed in the end of said composite material tube;
Bolt shank, said bolt shank and said connecting cylinder are through being threaded;
Nut, said nut and said bolt shank are through being threaded;
Bearing plate, said bearing plate is anchored on the end face of said composite material tube through said nut and being threaded of said bolt shank;
At least two key formula hoop covers; Said key formula hoop cover is formed by becoming internal diameter cylinder and four or more keies; Through said key being wedged in the gap between said change internal diameter cylinder and the said composite material tube, said change internal diameter cylinder is anchored on the said composite material tube end outside.
2. composite material foam core bar as claimed in claim 1, wherein said composite material tube is made up of with resin matrix continuous carbon fibre shop layer.
3. according to claim 1 or claim 2 composite material foam core bar, wherein said composite material tube has a plurality of shops layer along the pipe thickness direction, and wherein the fiber of at least one shop layer is arranged vertically, and the fiber direction of the most inboard shop layer and circumferential angle are greater than 0 degree.
4. composite material foam core bar as claimed in claim 1, wherein said foam-filled thing is made up of closed cell foam.
5. like claim 1 or 4 described composite material foam core bars, wherein said foam-filled thing is diameter and the identical plug of said composite material bore.
6. composite material foam core bar as claimed in claim 1, wherein said connecting cylinder is fixed in the composite material tube end through gluded joint.
7. like claim 1 or 6 described composite material foam core bars, splay in wherein said connecting cylinder termination, and minimal slope is 1/10.
8. like claim 1 or 6 or 7 described composite material foam core bars, between wherein said connecting cylinder and the said bearing plate gap is arranged.
9. composite material foam core bar as claimed in claim 1, wherein said bearing plate contacts with said composite material tube end face fully.
10. composite material foam core bar as claimed in claim 1, wherein said change internal diameter cylinder varied in thickness is identical with said key.
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 true CN102705686A (en) | 2012-10-03 |
| CN102705686B CN102705686B (en) | 2014-11-12 |
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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 |
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| Country | Link |
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| CN (1) | CN102705686B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107263879A (en) * | 2016-05-19 | 2017-10-20 | 西华大学 | Novel foam sandwich double-layer carbon fiber pipe |
| CN108757794A (en) * | 2018-06-26 | 2018-11-06 | 哈尔滨工程大学 | A kind of composite material stretches energy absorbing members and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE852353A (en) * | 1976-03-10 | 1977-09-12 | Dassault Avions | IMPROVEMENT IN DRIVE CONTROL AND TRANSMISSION RODS |
| 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 |
| 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 |
| 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 |
-
2012
- 2012-06-05 CN CN201210183266.5A patent/CN102705686B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE852353A (en) * | 1976-03-10 | 1977-09-12 | Dassault Avions | IMPROVEMENT IN DRIVE CONTROL AND TRANSMISSION RODS |
| 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 |
| 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 |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107263879A (en) * | 2016-05-19 | 2017-10-20 | 西华大学 | Novel foam sandwich double-layer carbon fiber pipe |
| CN107263879B (en) * | 2016-05-19 | 2019-03-29 | 西华大学 | Novel foam sandwich double-layer carbon fiber pipe |
| CN108757794A (en) * | 2018-06-26 | 2018-11-06 | 哈尔滨工程大学 | A kind of composite material stretches energy absorbing members and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102705686B (en) | 2014-11-12 |
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