论文部分内容阅读
主要研究了动载荷作用下的弹塑性弯曲延伸裂纹尖端的张开位移问题.综合考虑了动态作用应力、塑性区域边界上动态正应力与动态剪应力,利用二阶摄动方法与卡氏定理计算了弯曲裂纹尖端的动态张开位移.比较了弯曲延伸裂纹与直线裂纹动态断裂特性的连续性与统一性.论证了弹塑性动态断裂特性与线弹性动态断裂特性的连续性与统一性.开拓了一个计算弯曲延伸裂纹动态张开位移的理论模型的崭新领域.“,”The crack tip opening displacement（CTOD） of elastoplastic slightly curved extension crack under dynamic loads has been mainly studied;and curved CTOD has been calculated as a practical application of a second order perturbation method and theorem of surname KA,where the effects of dynamic applied stresses and dynamic normal and dynamic shear stresses on the boundaries of plasticity area are synthetically taken into considerations.Continuity and unitarity of dynamic fracture behaviors of curved extension crack and straight crack have been compared.Continuity and unitarity of elastoplastic dynamic fracture behaviors and linear elastic dynamic fracture behaviors have been demonstrated.A brand new domain of theoretical model where dymamic CTOD of elastoplastic curved extension crack was calculated,has been reclaimed.