粘塑性薄壁管中复合应力波的传播特性研究  

Study on propagation properties of combine d stress waves in viscoplastic thin-walled tubes

作　　者：李永池[1] 朱林法[1] 胡秀章[1] 袁福平[1] 曹结东[1] 

机构地区：[1]中国科学技术大学力学和机械工程系,安徽合肥230027

出　　处：《爆炸与冲击》2003年第1期1-5,共5页Explosion and Shock Waves

基　　金：国家自然科学基金项目(19572064)

摘　　要：以本构关系一般理论为基础,导出了计及材料功硬化效应和应变率硬化效应的粘塑性薄壁管的本构关系及管中复合应力波的控制方程,应用有限差分方法研究了在压扭复合冲击载荷作用下粘塑性薄壁管中复合应力波的传播特性与演化规律,分析了复合应力波的耦合效应以及薄壁管中粘塑性参数和功硬化效应对复合应力波传播与演化规律的影响,并对有关现象进行了分析和解释。According to general viscoplastic constitutive relation theory, the constitutive relation and control equations of combined stress waves in viscoplastic thin-walled tubes are derived. Finite-difference method was used to study propagation and evolution properties of combined stress waves under combined compressional and torsional loadings. Some new phenomena related to the coupling effects between normal and shear stresses are demonstrated and explained. The effects of plastic work and strain-rate hardening on combined stress waves are also studied.

关 键 词：固体力学 复合应力波 粘塑性 薄壁圆管 

分 类 号：O347.4[理学—固体力学]