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Composite foam sandwich bar

A technology of composite materials and composite material pipes, which is applied in the field of new material structures, can solve the problems that the high strength performance of carbon fibers is not fully utilized, the composite materials are easily damaged, and the pipe ends are delaminated and damaged, so as to achieve easy connection and fiber longitudinal strength. High, the effect of improving the bearing capacity

Active Publication Date: 2014-11-12
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, when the carbon fiber composite tube is subjected to axial tensile and compressive loads, since the composite material is easily damaged in the thickness and perpendicular to the fiber direction, the force on the carbon fiber is only 1 / 3 of the theoretical bearing capacity, and the tube end part appears prematurely. Layer damage or local instability of the pipe wall, so that the high strength performance of carbon fiber is not fully utilized

Method used

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  • Composite foam sandwich bar
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  • Composite foam sandwich bar

Examples

Experimental program
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Embodiment Construction

[0033] The invention is a composite material foam sandwich rod.

[0034] Figure 1 to Figure 8 It is an embodiment of the composite material foam sandwich rod, which includes a composite material tube 1 and a closed-cell foam tube core 2 placed in the composite material tube 1, and the connecting cylinders 3 are respectively fixed on the composite material tube 1 through adhesive joints 4 inside the end; the bolt rods 5 are respectively connected with the connecting cylinder 3 through internal threads; the nuts 6 are respectively connected with the bolt rods 5 through internal threads, and the pressure bearing plates 7 are respectively fastened to the two ends of the composite material pipe 1; in the composite material pipe At both ends of 1, two pairs of wedge-type hoops 8 are fastened to the outside of the composite material pipe 1; The thickness variation of cylinder 10 is consistent with the variation of wedge piece 11 thickness.

[0035] Composite pipe 1 is composed of ...

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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 [0001] The invention relates to a composite material foam sandwich rod, which belongs to the field of new material structures and can be applied to rod system structures in the fields of construction, aerospace, bridge engineering and the like. Background technique [0002] The rod system structure mainly bearing axial force is widely used in large-span structures in the fields of construction engineering, aerospace, mechanical engineering, etc., such as trusses, grid frames, and reticulated shells. Usually this type of structure is made of steel pipes, which have the advantages of firm structure, good weldability, and high rigidity, but also have the disadvantages of heavy weight and easy corrosion. Fiber-reinforced resin-based (Fibre-Reinforced Polymer, FRP) composite pipes, especially carbon fiber composite pipes (CarbonFibre-Reinforced Polymer, CFRP) have the advantages of high strength, small dead weight, corrosion resistance, etc., and can be used for u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16S3/00B32B9/04B32B27/12
Inventor 张大旭陈务军邹涛
Owner SHANGHAI JIAOTONG UNIV