Analogue simulation method for automobile windshield collision

Abstract

The invention relates to the technical field of finite element analysis, and discloses an analogue simulation method for automobile windshield collision. According to the method, an MAT32 # material card in LS-DYNA software is utilized; a windshield is defined by adopting a single-layer shell unit; simulation of an interlayer polymer entity shell unit is cancelled, the problem of calculation suspension caused by entity unit distortion or negative volume in collision simulation analysis can be avoided, the calculation stability of a simulation model is improved, multi-layer grid contact connection is cancelled, and meanwhile, the simulation calculation time can be obviously shortened by utilizing single-layer shell unit setting; besides, parameters used by the method are obtained from a sample-level test, a component-level test, a whole-vehicle-level test and analogue simulation. The method is high in practicability, collision simulation of different automobile windshields can be easilyachieved, the process that pedestrians collide with the windshields can be accurately simulated, accurate HIC damage values and damage curves are obtained, and therefore development of automobile andpedestrian protection performance can be guided.

Description

technical field [0001] The invention relates to the technical field of finite element analysis, in particular to an automobile windshield collision simulation method. Background technique [0002] At present, the windshield at the front of the car mainly includes a three-layer structure. The three-layer structure is: outer glass, interlayer polymer and inner glass. The interlayer polymer is infiltrated and connected with the inner and outer layers of glass to form a overall. Due to the structural complexity of the windshield, the simulation of windshield collision has become a difficult point in the development of automobile pedestrian protection performance. [0003] In the prior art, for windshield collision simulation, the shell-body-shell three-layer element common node simulation method, three-layer shell element contact simulation method, one-layer shell element and one-layer membrane element simulation method are generally used. However, these simulation methods all...

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Problems solved by technology

However, these simulation methods all belong to the separate modeling of glass and interlayer polymers, which are connected by common nodes or contacts. It is difficult to accurately simulate the fragmentation failure of the windshield, and the simulation results are quite different from the experimental data. , which is not conducive to the development of vehicle pedestrian protection performance

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