摘要
把最近提出的及计材料拉压屈服强度不同对材料断裂影响的复合型裂纹断裂准则扩充到疲劳裂纹扩展的情况,建立了一个新的复合型裂纹疲劳扩展准则,进而将位移不连续法(一种边界元方法)和本文提出的复合型裂纹疲劳扩展准则结合在一起,用于数值模拟复合型裂纹疲劳扩展过程.对中心斜裂纹板的疲劳扩展的数值模拟结果揭示了材料拉压屈服强度不同对复合型裂纹疲劳扩展的影响.
In this paper, a mixed-mode fracture criterion for the materials with different yield strengths in tension and compression is extended to a fatigue loading case to set up a new criterion of fatigue growth of a mixed-mode crack. Moreover, the new criterion is combined with a displacement discontinuity method which is a boundary element method to numerically simulate the fatigue growth process of a mixed mode crack. Numerical analysis of fatigue growth of a center-inclined crack shows the effect of the different yield strengths of materials in tension and compression on fatigue growth process of a mixed mode crack.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2004年第12期1627-1630,共4页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(10272037).
关键词
裂纹
疲劳
断裂
数值模拟
crack
fatigue
fracture
numerical simulation
