The Effects of Material Properties on Rebound Characteristics of Deris in Automobile Crash

Abstract

In order to study the effects of material properties on rebound characteristics of debris in different thrown condition, and promote the dynamic behavior model of debris further in automobile crash, the dynamic rule of elastic and elastic-plastic's rebound parameters vary with thrown condition are obtained by kinetic simulation analysis. The rebound parameters indexes are vertical rebound coefficient, horizontal rebound coefficient, angle lost coefficient. The effects of rebound characteristics on dynamic behavior after collision are discovered. The trend curves of different material nature varying with rebound parameters are given by combing qualitative analysis with quantitative calculation. The abnormal phenomena of debris's motion just like breaking rebound, is expounded. The results of simulation tests show that the rebound parameters of elastic-plastic debris vary with thrown velocity and thrown angle in non-linear, but in linear with thrown height. Sometimes the rebound parameters of elastic-plastic debris are higher than 1. Then, the rebound parameters of elastic debris vary with thrown height in non-linear, and the change trends is closed. The vertical rebound coefficient, the horizontal rebound coefficient, and the rebound coefficient of elastic debris vary with thrown angle upward with small change ranges, but big change ranges in downward.