Four-unit-cell metal tube for absorbing energy during automobile collisions

Abstract

The invention discloses a four-unit-cell metal tube for absorbing energy during automobile collisions. A body is a conical thin walled tube. A cross-shaped tube wall is arranged inside the body. The tube wall extends from the top end of the body to the bottom end of the body. An inward-concave preformed deformation groove is formed in the middle of the body. The taper of the body is 0.3. During contact between a conical tube and a rigid wall, due to the fact that the outer diameter of the conical tube is smaller than that of a circular tube, the strength of the conical tube is lowered, the conical tube is more easily compressed compared with a circular tube with the larger outer diameter, and a small initial peak load is generated correspondingly. Accordingly, in the collision energy absorption process of the thin walled tube, compared with the circular tube, the specific absorbed energy of the thin-walled tube can be increased due to the conical tube; due to the taper of the conical tube is 0.3, in the inclined collision process, the component force in the speed loading direction is increased along with decrease of the inclined collision angle, so that the initial peak load is increased, and the specific absorbed energy is increased; accordingly, the taper is 0.3 preferentially. After the preformed deformation groove is added, deformation happens at the preformed deformation groove, the deformation direction and the deformation process become controllable, and the heat absorption performance of the four-unit-cell conical tube is further improved.

Description

technical field [0001] The invention relates to a four-cell metal tube used for absorbing energy when an automobile 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 energy absorption characteristics of conical tubes, espe...

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.

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