冲击载荷作用下裂纹动态响应的数值模拟  

Simulation on dynamic response of crack subjected to impact loading

作　　者：胡柳青[1] 李夕兵[1] 龚声武[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《爆炸与冲击》2006年第3期214-221,共8页Explosion and Shock Waves

基　　金：国家自然科学基金项目(10472134;50490272)

摘　　要：对垂直、剪切以及斜向等各种冲击载荷作用下裂纹的动态响应进行了数值模拟,得到了一系列随时间变化的动态应力场以及应变场图;根据其定义,计算出了相应的动态应力强度因子,进而分析了斜向载荷作用下裂纹起裂情况,并对最优断裂问题进行了阐述。The numerical simulation was carried out for the dynamic response of crack subjected to the normal, shear and oblique impact loads. The dynamic stress field and the strain field were obtained. According to its definition, the corresponding dynamic stress intensity factor （DSIF） was calculated. The situation of initiation of crack impacted by oblique loads was analyzed, and the optimization fracture by stress pulses was discussed.

关 键 词：爆炸力学 动态应力强度因子 数值模拟 裂纹 最优断裂 冲击载荷 

分 类 号：O383.2[理学—流体力学] TD235[理学—力学]