摘要
讨论了粘塑性变截面杆中的一维应力波传播规律。在粘塑性本构理论框架的基础上,利用特征关系和冲击波阵面上的突跃条件,得出了冲击波在传播过程中的演化规律,包括其微分方程和解析表达式,并对Bodner和Johnson-Cook材料和不同收缩形式的杆中冲击波的演化规律进行了讨论,同时计算和讨论了杆中冲击波后方应力波传播规律的特点。
This paper discusses the propagation of one-dimensional stress waves in a viscoplastic bar with variable section. Based on the constitutive relation theory which includes internal variables, combining with the characteristic relations and the jump conditions across a shock wave, the evolution rules, indudins their differential equations and the analytical expressions, are obtained. For examples, the shock wave evolution rules in bars with Bodner and Johnson-Cook materials and different sectionvarying forms are discussed. The propagation rules and characteristics of stress waves behind the shock front are also calculated and discussed.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2005年第6期481-486,共6页
Explosion and Shock Waves
关键词
固体力学
演化规律
冲击波
粘塑性杆
solid mechanics
evolution rules
shock waves
viscoplastic bar