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A High Compression Ratio Inverted Composite Tube Impact Energy Absorber

A composite material tube, high compression ratio technology, applied in bumpers and other directions, can solve the problems of composite material tube rupture and load rise, and achieve the effect of maintaining the structure intact, the compression ratio is large, and the crush triggering method is stable

Active Publication Date: 2021-08-20
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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

Method used

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  • A High Compression Ratio Inverted Composite Tube Impact Energy Absorber
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  • A High Compression Ratio Inverted Composite Tube Impact Energy Absorber

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Embodiment

[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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Abstract

The invention relates to a high-compression-ratio inversion composite material pipe impact energy absorber, comprising: a composite material pipe, an inversion joint and a flat compression joint respectively connected to both ends of the composite material pipe, and an upward-turning overturning joint is provided inside the inversion joint On the curved surface, a through hole is opened in the middle of the flat pressure joint. Compared with the prior art, the present invention can be used as a structural part under normal working conditions, crushed and absorbed energy after being subjected to a relatively large impact load, has stable crushing trigger mode, large compression ratio, and structural integrity during the crushing process The advantages.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R19/02B60R19/24
CPCB60R19/02B60R19/24
Inventor 于哲峰
Owner SHANGHAI JIAOTONG UNIV