Three Dimensional Criterion for Creep Crack Propagation in C(T) Specimen

摘要：

　　Experimental of two kinds of compact tension (CT) specimens’ creep crack propagation are carried out in this paper.Traditional fracture mechanics and three-dimensional fracture theory are compared and the results show that: The K-Tz two-parameter model can eliminate the thickness-effect on the crack growth rates in the relatively low K range,however when K exceed certain values the effect of thickness for crack growth rates still exists; The Ct and Ct-Tz model can describe the thickness-effect of creep crack growth rates in regions of high Ct; When the crack tip stress intensity factor K of the two kinds of thickness (B=5 mm,B=10 mm) specimens equal to 35 Mpa√m and 31 Mpa√m respectively,this material’s creep crack growth control parameter change from K to Ct.

关键词： stress triaxiality constraint three dimension fracture creep crack propagation thickness-effect

作者: Wenming Ye Xuteng Hu Wanlin Guo YingDong Song

作者单位: State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing 210016,China Jiangsu Province Key Laboratory of Aerospace Power System,Nanjing University of Aeronautics and Astr

会议类型: 国际会议

会议名称: 2016 International Symposium on Structural Integrity，ISSI—2016(2016国际结构完整性研讨会)

会议地点: 天津

会议语种:英文

页码: 142-147

在线出版日期: 2016-05-26（万方平台首次上网日期，不代表论文的发表时间）