Automotive collision energy-absorption sandwich structure

Abstract

The invention provides an automotive collision energy-absorption sandwich structure. The automotive collision energy-absorption sandwich structure is characterized in that an end energy-absorption layer, an energy-absorption inner core and an energy-absorption inner core wrapping layer are included; the end energy-absorption layer is formed by compositing titanium metal layers and aluminum alloy level corrugated pipes, and the aluminum alloy level corrugated pipes are arranged between the two titanium metal layers; the energy-absorption inner core comprises aluminum alloy circular pipes and metal foam materials, and the metal foam materials are arranged in an aluminum alloy circular pipe interlayer; an energy-absorption inner core structure is formed by inner core unit cell structures on an X axis, a Y axis and a Z axis in an array mode according to an upright-inversion-upright sequence, and all the inner core unit cell structures are connected in a braze welding mode; and the inner core unit cell structures comprise the aluminum alloy circular pipes and the metal foam materials, and the metal foam materials are arranged in the aluminum alloy circular pipe interlayer. The problemsof high peak stress, low efficiency, high weight, narrow application face and the like of a traditional collision energy-absorption box are solved.

Description

Technical field [0001] The invention is a new type of automobile collision energy absorbing 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 now 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 cars has brought convenience to people's lives, but also brought more serious safety and environmental issues. Therefore, improving automobile safety and environmental protection is the common goal of the global automobile industry. When a car crashes, the thin-walled energy-absorbing box structure on the longitudinal beam of the car is crushed and deformed to absorb the energy generated by the collision, thereby reducing the collision energy transmitted to the occupant to the greatest extent, so as to protect t...

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Problems solved by technology

[0003] The main problem to be solved by the present invention is to overcome the problems of high peak stress, inefficiency, heavy mass and narrow application area of ​​traditional crash boxes, and to design a car crash box with low peak stress, high efficiency, light weight and wide applicability , to achieve the goal of safe, lightweight and environmentally friendly automobile development

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