Three-Dimensional Characteristic Analysis of Mixed Mode Crack Based on a Mixed Mode Triaxial Stress Constraint Tz

摘要：

A mixed-mode triaxial stress constraint Tz is introduced. The three-dimensional mixed-mode fracture theories based on linear elastic fracture mechanics and Tz are established. The plastic zone and stress triaxiality Rσ under three-dimensional mixed mode fields are studied. It is shown that the plastic zone is a function of loading angle φ, angular direction θ and Tz The plastic zone size decreases with increasing T., but the direction of its minimum does not change with Tz The stress triaxiality Rσ increases with increasing Tz. Under the same loading mixity the direction of Rσmax changes with Tz. Under given Tz, the value Rσmax does not change when Tz=0, and deereases with the loading mixity except pure mode Ⅱ loading condition.

关键词： mixed mode crack mixed mode triaxial tress constraint plastic zone tress triaxialty

作者: DONG Huiru LIU Quanliang ZHANG Zhiguo CHEN Yunxiang

作者单位: Engineering College,Air Force Engineering University,Xian 710038,Shaanxi,China;School ofAero & Astr School ofAero & Astronautics,Xian Jiaotong University,Xian 710049,Shaanxi,China Engineering College,Air Force Engineering University,Xian 710038,Shaanxi,China

会议类型: 国际会议

会议名称: The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)

会议地点: 北京

会议语种:英文

页码: 1903-1908

在线出版日期: 2008-09-24（万方平台首次上网日期，不代表论文的发表时间）