摘要
针对应力三轴性对裂纹尖端应力应变场的影响,讨论了均匀材料裂纹体的断裂准则,建立了基于J^Q双参数准则的失效评定曲线。利用有限元数值解的结果,得到了失效评定曲线中各参量的工程估算方法。通过实例,对本文所建立失效评定曲线的计算方法和现有的计算途径进行了比较。
Considering the influence of stress-triaxiality on stress-strain field near crack tip, the theory that used to access the integrity of homogeneous materials has been discussed in this paper. In addition, the failure assessment curves of cracked structure based on double-parameter J^Q criterion are founded. By util-izing the finite element numerical results, the engineering treatment methods of each factor in the failure as-sessment curves are obtained. In the end, calculatiion approach for the failure assessment curves set up in this paper has been compared with the available procedure.
出处
《核动力工程》
EI
CAS
CSCD
北大核心
2004年第5期430-433,451,共5页
Nuclear Power Engineering
基金
陕西省教育厅自然科学基金资助项目(01JK134)
关键词
失效评定曲线
J-Q双参数准则
断裂参量
有限元法
Failure assessment curves,Double-parameter J-Q criterion,Fracture criterion,Finite element method
