Sandwich structure applied to automobile crash energy-absorption box

Abstract

The invention provides a sandwich structure applied to an automobile crash energy-absorption box. The sandwich structure comprises an upper-layer composite board, a composite interlayer and a bottom-layer composite board which are arranged in a stacked mode, wherein the upper-layer composite plate comprises composite material fiber cloth and a titanium metal plate which are arranged in a stacked manner; the composite interlayer comprises a calabash pipe thin-wall structure and a garland type honeycomb structure; the bottom-layer composite plate comprises a titanium metal plate and a porous metal material which are arranged in a stacked mode. According to the sandwich structure, the problems of high peak stress, low efficiency, heavy weight and the like of a traditional collision energy absorption structure are solved, an efficient and light automobile collision energy absorption structure with low peak stress can be designed, and the safe, light and environment-friendly automobile development target is achieved.

Description

technical field [0001] The invention is an automobile collision sandwich structure, which belongs to the field of automobile passive safety protection. Background technique [0002] With the continuous development of the automobile industry, it has become one of the important pillar industries of the national economy. As of the end of 2018, the number of automobiles in my country has reached 240 million. The rapid increase in the number of automobiles has brought convenience to people's lives, but it has also brought about serious safety and environmental issues. Therefore, improving automobile safety and environmental protection is the common goal of the global automobile industry. When a car collides, the thin-walled energy-absorbing box structure on the crossbeam and longitudinal beam of the car absorbs the energy generated by the collision through crushing and plastic deformation, thereby reducing the collision energy transmitted to the occupant as much as possible to a...

AI Technical Summary

Problems solved by technology

At present, the structures of automobile crash absorbing boxes are mostly square or circular tubular components, which have high peak stress and low specific energy absorption, and cannot achieve better safety performance in the event of a car collision. At the same time, most of the current crash absorbing boxes Higher crashworthiness, its quality is generally heavier, and the heavier body weight brings more energy consumption and emissions, so most of the current energy-absorbing boxes cannot meet people's concerns about car safety and lightweight. and environmental requirements

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