Collision analogue simulation method for automobile aluminum alloy section part

Abstract

The invention discloses a collision analogue simulation method for an automobile aluminum alloy profile part, which comprises the following steps: carrying out an aluminum alloy profile sample-level material test to obtain material data including test force-displacement curves under different test force states and failure strain of a material under different stress states; establishing an MAT*-36material card and an MAT*-ADD _ EROSION material card of an aluminum alloy profile by combining material data obtained by a test and applying LS-DYNA finite element analysis software, and determiningparameters required to be calibrated by the material cards; establishing a material test simulation model, and carrying out material test calibration including a non-failure part and a failure part; carrying out an aluminum alloy profile part drop hammer impact test, bring the calibrated material card into the aluminum alloy profile part drop hammer impact simulation model, and confirming the final aluminum alloy profile part collision simulation model through part test calibration. By means of the method, accurate analogue simulation of deformation and failure of the aluminum alloy profile part under the automobile collision working condition can be achieved.

Description

technical field [0001] The invention belongs to the technical field of collision simulation simulation of automobile parts, and in particular relates to a collision simulation method of automobile aluminum alloy profile parts. Background technique [0002] In recent years, with the continuous increase of car ownership and the increasing number of traffic accidents, the government and consumers have paid more and more attention to car safety year by year. With the increasingly stringent regulations on automobile emissions and energy consumption, the lightweight of automobiles has attracted more and more attention from the industry. The characteristics of high strength, low density and simple forming process of aluminum alloy profiles make them more and more widely used in automobile bodies. universal. The application of aluminum alloy profiles in key safety structural parts such as automobile anti-collision beams, energy-absorbing boxes, and battery frames has brought new pr...

AI Technical Summary

Problems solved by technology

The application of aluminum alloy profiles in key safety structural parts such as automobile anti-collision beams, energy-absorbing boxes, and battery frames has brought new problems to automobile safety simulation: on the one hand, different from traditional steel parts, aluminum alloy profiles have obvious anisotropy; on the other hand, the plasticity of aluminum alloy is worse than that of steel, and it is more likely to fail and fracture during the collision process. Therefore, it is particularly important to accurately simulate the damage and failure of aluminum alloy profiles during automobile collisions.

[0005]1. In this method, aluminum alloy profiles generally adopt isotropic material constitutive, so it is difficult to accurately simulate the deformation of profiles during collision;

[0006]2. In terms of failure simulation of aluminum alloy profiles, this method uses a single theoretical failure model to deal with the problem, and the stress state of aluminum alloy profile parts during the collision process It is relatively complex, and the existing CAE computer-aided engineering simulation cannot meet the damage and failure simulation requirements of aluminum alloy profiles in complex stress states

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