SPH方法中本构模型及在侵彻问题中的应用  

The Constitutive Model in the SPH Method and Its Application in the Penetration

作　　者：张岳青[1] 郑茂军[2] 赵燕[1] 

机构地区：[1]西北工业大学航空学院,西安710072 [2]沈阳航空发动机研究所,沈阳110015

出　　处：《科学技术与工程》2011年第16期3609-3614,共6页Science Technology and Engineering

摘　　要：研究侵彻问题中,在自编的光滑流体动力学SPH(smoothed particle hydradanamic)程序中引入两类本构模型,一类考虑状态方程的影响,一类采用弹塑性本构积分。对相同子弹冲击飞机蒙皮的算例进行了模拟分析。数值算例验证了弹性预估-塑性校正算法的稳定性和求解精度,给出了侵彻过程中靶板的破坏形式、等效应力等的演化规律,并分析了物态方程和弹塑性本构模型对侵彻的影响。Two kinds of models are introduced into our SPH programme,one is the model of EOS,the other is elastic-plastic constitutive integration.The effect of the two models are simulated and analyzed through the example of impacting the skin of airplane.The stability and precision of the elastic predictor-plastic corrector numerical integration algorithm has been proved.The images of target damage and equivalent stress at different time steps are given,then the effect of the equation of state and the elastic-plastic constitutive model in the penetration are discussed.

关 键 词：SPH方法 弹塑性本构 侵彻机理 状态方程 

分 类 号：TU347.1[建筑科学—结构工程]