【摘要】 弹靶碰撞可用来确定材料的动屈服强度,作者提出了一种新的弹靶接触面积增长模型——阻滞增长模型,该模型假设接触面积的增长率为接触面积的减函数.并采用该模型对经典的弹靶撞击理论——Taylor理论,进行了修正.与Taylor理论和钱伟长修正理论相比,本文的理论更符合实际,并与有限元结果一致.更多还原

【Abstract】 Taylor’s theory is a projectile￣target impacting theory,which is used to measure the dynamic yield strength of materials.Because of the hypothesis of area increase model of interface between the projectile and target,there is large difference between the results of test and forecast.A new area increase model of interface between the projectile and target—preventing area increase model bring forward in this paper.The model hypothesizes that the interface area’s increasing acceleration is the interface area’s decreasing function.Then the classical strike theory—Taylor’s theory was modified under this hypothesis.Comparing with the Taylor’s theory,the model in this paper is more consist with the fact.更多还原