Collision analogue simulation method for automobile foamed plastic material

Abstract

The invention discloses a collision analogue simulation method for an automobile foamed plastic material. The method comprises the following steps: carrying out a foamed plastic material sample-levelmaterial test to obtain material data including test force-displacement curves under different test force states and the failure strain of the material under different stress states; establishing an MAT*_083 material card and an MAT*_ADD_EROSION material card of the foamed plastic by applying LS-DYNA finite element analysis software in combination with the material data obtained in the step S1, and determining parameters 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 a foamed plastic high-speed impact test, substituting the calibrated material card into the foamed plastic high-speed impact simulation model, and determining a final foamedplastic high-speed impact test simulation model through foamed plastic test calibration. According to the invention, the accurate analogue simulation of deformation and fracture failure characteristics of an automobile foamed plastic material can be realized.

Description

technical field [0001] The invention belongs to the technical field of simulation testing of automobile foam plastic materials, and in particular relates to a collision simulation simulation method of automobile foam plastic materials. Background technique [0002] With the continuous increase of the number of cars in our country, the incidence of traffic accidents is becoming more and more frequent; in order to improve the crashworthiness and maintenance economy of low-speed collisions, and reduce the damage to pedestrians in collision accidents, a large amount of foam plastic materials are used in the front and rear ends of cars . Accurately simulating the deformation and destruction of foamed plastics in the process of automobile collision has become a new challenge in the simulation of automobile safety design. Existing simulation methods for foamed plastic materials do not consider failure and damage. In actual tests, foamed plastics, especially rigid foamed plastics c...

AI Technical Summary

Problems solved by technology

Existing simulation methods for foamed plastic materials do not consider failure and damage. In actual tests, foamed plastics, especially rigid foamed plastics commonly used in automobiles, often undergo partial failure and damage under high-speed impact. For OEMs, how to obtain The accurate fracture failure characteristics of various foam plastic materials have become the focus and difficulty in the development of safety performance

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