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Single crystal cell metal tube for absorbing energy during vehicle collision

A metal tube, single cell technology, used in bumpers and other directions

Inactive Publication Date: 2016-04-06
CHENGDU KAISHENG SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research on thin-walled metal tubes at home and abroad mainly focuses on the energy absorption characteristics of square tubes and circular tubes, but there is no research on the impact energy absorption of conical tubes, especially the energy absorption characteristics of conical tubes with unit cells.

Method used

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  • Single crystal cell metal tube for absorbing energy during vehicle collision

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Effect test

Embodiment Construction

[0010] -Such as figure 1 As shown, the single cell metal tube used for energy absorption when the car is collided is characterized in that the main body 1 is a tapered thin-walled tube. Body 1 has a taper of 0.3. The ratio of the wall thickness to the height of the main body 1 is 1:15-1:30, and the optimal ratio is 1:25.

[0011] We established different simulation models to obtain initial peak load (IPL) and specific energy absorption (SEA), which are data characterizing energy absorption characteristics. These models have straight circular tubes and tapered tubes with three different tapers. The tapers of the tapered tube geometry models are 0.05, 0.1, 0.2 and 0.3, respectively. The three conical canals are the single-crystal cell spinal canal, the two-crystal cell spinal canal and the four-crystal cell spinal canal. Conical tubes with different tapers have the same maximum outer diameter. The geometric model is meshed with Hypermesh, and the pipe wall is made of LD2 alu...

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Abstract

The invention provides a single crystal cell metal tube for absorbing energy during vehicle collision. A main body is a conical thin wall pipe, the taper of the main body is 0.3, and the ratio of the wall thickness to height of the main body is (1:15)-(1:30). In an oblique collision process of a conical tube with the taper of 0.3, with the decrease of an oblique collision deflection angle, the component force in a loading velocity direction increases, so that the initial peak load is increased and the specific energy absorption is increased. Therefore, optimization is realized when the taper is 0.3.

Description

technical field [0001] The invention relates to a single cell metal tube used for absorbing energy when a car is collided. Background technique [0002] The energy absorption characteristics of automotive structural parts during high-speed collisions are the basis of crash safety research. Thin-walled metal tubes are the basic structure of a car and the main energy-absorbing structure in a crash. When the thin-walled metal tube is impacted by axial load, it will produce different deformation modes to absorb and dissipate energy to ensure the safety of vehicles and passengers. Therefore, research on the energy absorption characteristics of thin-walled metal tubes during high-speed collisions is the basis for automobile crash safety. The research on thin-walled metal tubes at home and abroad mainly focuses on the energy absorption characteristics of square tubes and circular tubes, but there is no research on the impact energy absorption of conical tubes, especially the ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R19/02
Inventor 王强李玲玲
Owner CHENGDU KAISHENG SCI & TECH
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