Three-parameter approaches for three-dimensional crack-tip stress fields

摘要：

　　Two three-parameter descriptions for the three-dimensional (3D) crack-tip stress fields have been introduced.The three-parameter solution K-T-Tz is developed to describe the linear elastic crack-tip stress state,and the J-QT-Tz is to elastic-plastic crack-tip field.The conventional two-dimensional solutions such as K,K-T,HRR and the extended J-Q description which considers the in-plane constraint modification can hardly provide satisfied description for the three-dimensional crack front fields,especially for the out-of-plane stress near the crack front.It is shown that a consideration of the out-of-plane constraint and use of the three-parameter description is necessary and efficient to predict the 3D stress fields near the crack front.

关键词： Fracture mechanics Three-dimensional stress field Out-of-plane stress constraint

作者: Chongmin She Junhua Zhao Wanlin Guo

作者单位: State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronau Institute of Structural Mechanics,Bauhaus-University Weimar,99423 Weimar,Germany

会议类型: 国际会议

会议名称: 第13届国际断裂大会(ICF2013)

会议地点: 北京

会议语种:英文

页码: 1-8

在线出版日期: 2013-06-16（万方平台首次上网日期，不代表论文的发表时间）