An analysis of collective damage for short fatigue cracks based on equilibrium of crack numerical density

被引：18
作者：
Qiao, Y [1 ]
Hong, YS [1 ]
机构：
[1] Chinese Acad Sci, Inst Mech, Lab Nonlinear Mech Continuous Media, Beijing 100080, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 1998年 / 59卷 / 02期
关键词：
short fatigue cracks; crack numerical density; collective damage; fatigue life; damage moment;
D O I：
10.1016/S0013-7944(97)00098-2
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Collective damage of short fatigue cracks was analyzed in the light of equilibrium of crack numerical density. With the estimation of crack growth rate and crack nucleation rate, the solution of the equilibrium equation was studied to reveal the distinct feature of saturation distribution for crack numerical density. The critical time that characterized the transition of short and long-crack regimes was estimated, in which the influences of grain size and grain-boundary obstacle effect were investigated. Furthermore, the total number of cracks and the first order of damage moment were discussed. (C) 1998 Elsevier Science Ltd.
引用
收藏
页码：151 / 163
页数：13
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