爆炸与冲击2018，Vol.38Issue(2)：397-403,7.DOI:10.11883/bzycj-2016-0177
金属铅在斜冲击波对碰加载下动态行为的数值模拟
Numerical investigation of dynamic behavior of metal Pb driven by oblique shock waves
摘要
Abstract
Dynamic behaviors of metal materials subjected to intense shock loading is presently a focus in basic research and engineering application in the field of shock wave study.This work investigated dynamic behaviors within the metal Pb loaded by two oblique shock waves via Smooth Particle Hydro dynamic (SPH) method,with an emphasis on the influence of different initiation points on the dynamic behaviors in the collision zone.Utilizing the shock polar theory,we obtained the critical angle for an incident oblique shock wave varying with the Mach number,which indicated a transition from regular to Mach reflection.The comparison of the numerical data with the theoretical plot confirmed the interaction of two oblique shock waves,thus essentially revealing the Mach reflection and the formation of the Mach stem.As the distance of the initiation point from the Pb surface increases,so do both the incident pressure and the angle for an oblique shock wave,including also the generated Mach stem.Based on the free surface velocity profiles,we calculated the width of the Mach stem and the Mach angle,the results being in good agreement with the theoretical prediction.关键词
铅/对碰/马赫反射/斜冲击波Key words
Pb/collide/Mach reflection/oblique shock wave分类
数理科学引用本文复制引用
任国武,张崇玉,张亚军,洪仁楷,陈永涛..金属铅在斜冲击波对碰加载下动态行为的数值模拟[J].爆炸与冲击,2018,38(2):397-403,7.基金项目
国家自然科学基金项目(11472254) （11472254）
