Inwardly turned-over composite tube impact energy absorber with high compression ratio
A composite material tube, high compression ratio technology, applied in the direction of bumpers, etc., can solve the problems of composite material tube rupture, load rise, etc., and achieve the effect of structural integrity, large compression ratio, and stable crush trigger mode
Active Publication Date: 2018-10-12
SHANGHAI JIAO TONG UNIV
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However, in this patent, there is no flat pressure joint. If there is no flat pressure structure, there will be no means of connection with the structure. If there is a flat pressure joint, the end of the flat pressure joint is closed, and the composite material tube will start to collapse when the length reaches half. Gradually fills the internal cavity, during which the load is gradually increased until the composite tube ruptures
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[0023] A high compression ratio inversion composite tube impact energy absorber, its structure is as follows Figure 1-2 As shown, it includes a composite material tube 2, an inversion joint 3 and a flat compression joint 1 respectively connected to both ends of the composite material tube 2, and the inversion joint 3 and the flat compression joint 1 are connected to the composite material tube 2 by rivets. Inside the inversion joint 3, there is an upward-turning inversion curved surface 4, which connects with the inner wall of the inversion joint 3 and presents a smooth transition. When the composite material tube 2 is under pressure, its tube wall bends along the inversion surface 4 , then flip inwards. In addition, a threaded hole 5 is provided in the middle of the inversion joint 3, so as to facilitate connection with other components. A through hole 6 is opened in the middle of the flat compression joint 1 . A groove 7 is formed on the outer periphery of the through hol...
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The invention relates to an inwardly turned-over composite tube impact energy absorber with a high compression ratio. The inwardly turned-over composite tube impact energy absorber with the high compression ratio comprises a composite tube, an inwardly turned-over joint and a flat pressing joint, wherein the inwardly turned-over joint and the flat pressing joint are correspondingly connected to the two ends of the composite tube; a turnover curved surface which is turned over upwards is arranged in the inwardly turned-over joint; and a through hole is formed in the middle of the flat pressingjoint. Compared with the prior art, the inwardly turned-over composite tube impact energy absorber with the high compression ratio has the advantages that the inwardly turned-over composite tube impact energy absorber with the high compression ratio can be used as a structural part in a normal working state and can be crushed and absorb energy after suffering larger impact load; the crushing triggering mode is stable; the compression ratio is large; and the structure is kept complete in the crushing process.
Description
technical field [0001] The invention relates to the technical field of energy-absorbing structures, in particular to a high-compression-ratio inversion composite material tube impact energy absorber. Background technique [0002] The anti-collision structure of the lower part of the aircraft fuselage, the helicopter floor, the vehicle anti-collision beam structure, the aircraft landing gear, the buffer seat and other structures or equipment will be affected by impact loads, and energy-absorbing devices can be used to protect equipment or personnel from greater impacts . The process of composite material crushing can absorb a large amount of energy, and the composite material is relatively light, so it has the characteristics of high energy absorption ratio and is suitable for use as an energy-absorbing device, but the existing composite material energy-absorbing device cannot be used as a structural element at the same time use. [0003] Chinese patent CN105905056A disclos...
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IPC IPC(8): B60R19/02B60R19/24
CPCB60R19/02B60R19/24
Inventor 于哲峰
Owner SHANGHAI JIAO TONG UNIV