摘要
采用弹性—粘塑性本构模型，对幂理化粘塑性介质中反平面剪切动态扩展裂纹尖端的应力、应变场进行了渐近分析，给出了反一面剪切动态扩展裂纹尖端场的渐进方程。分析结果表明，在裂纹尖端应力具有的奇异性，应变具有的奇异性。从而揭示了幂硬化粘塑性材料反平面剪切动态扩展裂纹尖端场的渐近行为。
The paper adopted elastic-viscoplastic constitutive model,the stress and strain asymptotic fieldsnear anti-plane shear dynamic propagating crack-tip in power-law-viscoplastic medium are studied.Asymptotic equations of anti-plane shear dynamic propsgating crack-tip field are given.It is shownthat the stress and strain singularities are respectjvity of the order and.Thereforethe asymptotic behaviour near anti-plarie shear dynamic propagating crack-tip field in power-law -vis-coplastic material is revealed.
出处
《应用力学学报》
CAS
CSCD
北大核心
1994年第1期95-100,共6页
Chinese Journal of Applied Mechanics
关键词
断裂力学
粘塑性
裂纹扩展
power-law-viscoplastic,dynamic propagation,viscocity coefficient,crack tip fild.
