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Thin-walled energy-absorbing device

An energy-absorbing device and thin-walled technology, applied in bumpers and other directions, can solve problems such as excessive initial yield loads, and achieve the effects of absorbing and dissipating more kinetic energy, good deformation controllability, and stable failure modes

Active Publication Date: 2014-12-03
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The curved section can ensure a stable failure mode and controllable plastic deformation, and the patent also has the problem of excessive initial yield load

Method used

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  • Thin-walled energy-absorbing device
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  • Thin-walled energy-absorbing device

Examples

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Embodiment Construction

[0039] The present invention will be described in detail below in conjunction with examples.

[0040] The front view of the thin-walled cylinder with regular pyramidal corrugations of the present invention is as figure 2 As shown, the left view is image 3 As shown, the outer surface of the thin-walled round tube is an energy-absorbing unit at a certain interval h along the axial direction of the thin-walled cylinder, and the structure and size of each energy-absorbing unit are the same.

[0041] The specific structure diagram of the energy absorbing unit of the thin-walled cylinder is as follows Figure 8 As shown, it can be described as follows:

[0042] The energy absorbing unit is OO 1 An n-sided cylindrical structure with a shaft, n is a natural number greater than or equal to 3. When n is equal to 11, the left view of the cylindrical structure is as image 3 Shown. The inner cross section of the cylinder and the outer cross section at half the height of the energy absorbing un...

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Abstract

The invention provides a thin-walled energy-absorbing device when a vehicle is passively collided and belongs to the technical field of damping parts for vehicle collision impact. The energy-absorbing device comprises energy-absorbing units which are connected with one another and have the same structure and size; the inner surface of each energy-absorbing unit is in a regularly N-sided shape, and each side of the energy-absorbing unit forms an energy-absorbing body of the energy-absorbing unit; and the outer surface of the energy-absorbing body is of a pyramid-shaped corrugated structure. When the energy-absorbing device is a regularly 11-sided thin-walled cylinder, the height h of each energy-absorbing unit is 70.38 mm; when the radius of an externally tangent circle on the inner surface of each energy-absorbing unit is 40.16 mm, the energy-absorbing effect of the energy-absorbing device is optimal. The energy-absorbing device has the benefits that the requirements of high specific energy absorption ratio and low load uniformity coefficient can be simultaneously satisfied, and the performances of deformation controllability and impact adsorption function when a thin-walled energy-absorbing structure is widely applied to a vehicle is passively collided are improved, so that the passive safety of the vehicle is improved.

Description

Technical field [0001] The invention belongs to the technical field of damping accessories for vehicle collision impulse, and specifically relates to a thin-walled energy absorbing device when a vehicle is passively impacted. Background technique [0002] The crashworthiness of vehicles in collision accidents is a key link in passive safety analysis. Metal thin-walled structures are widely used in various fields such as automobiles, ships, and aerospace due to their good crash resistance and energy absorption characteristics. In the current design of anti-collision energy-absorbing structures in industries such as automobiles, ships, aircrafts, etc., generally thin-walled metal cylindrical tubes or square-section tubes with a smooth surface are used. [0003] Metal thin-walled energy-absorbing components mainly dissipate the impact kinetic energy generated by a fierce collision through plastic deformation. In actual collision accidents, there are often multiple failure modes or mul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60R19/18
Inventor 胡晓光杨靖波
Owner CHINA ELECTRIC POWER RES INST
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