摘要
为了能合理建立材料的失效函数,基于变形路径对延性损伤破坏影响的研究结果,结合数值模拟和优化方法,对几种典型缺口试件的拉伸颈缩破坏试验进行了分析,给出了缺口试件拉伸试验中的失效函数的计算方法.
During tensile deformation of a ductile bar after necking, stress triaxiality distributions in the neck cross-section vary greatly. The fracture loea, widely used in numerical simulation, can describe the failure strain under simple loading, not taking into account of the effects of loading path. In this paper a method is introduced for calculation of failure function from tension tests on notched specimens based on the obtained results on ductile damage induced by loading path.
出处
《固体力学学报》
CAS
CSCD
北大核心
2008年第4期385-388,共4页
Chinese Journal of Solid Mechanics
基金
中国工程物理研究院科学技术发展基金(2007A04001)
总装武器装备探索研究项目(6130516)资助
关键词
缺口试件
拉伸试验
应力三轴度
失效函数
notched specimen, tensile test, stress triaxiality, numerical simulation
