Multi-scale model for linking collective behavior of short and long cracks to continuous average fatigue damage

被引：15
|
作者：
Sun, Bin [1 ,2 ]
Xu, You-Lin [2 ]
Li, Zhaoxia [1 ]
机构：
[1] Southeast Univ, Dept Engn Mech, Jiangsu Key Lab Engn Mech, Nanjing 210096, Peoples R China
[2] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hong Kong, Peoples R China
来源：
ENGINEERING FRACTURE MECHANICS | 2016年 / 157卷
基金：
中国国家自然科学基金;
关键词：
Multi scale; Fatigue damage; Crack; Effective stress; GROWTH; NUCLEATION; INITIATION; EVOLUTION; ACCUMULATION; PROPAGATION; SIMULATION; DENSITY; RULE;
D O I：
10.1016/j.engfracmech.2016.02.013
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
A multi-scale model is developed in this study for linking collective behavior of short and long cracks to continuous average fatigue damage. By using the developed model, the average fatigue damage evolution can be evaluated through some parameters that reflect collective behavior of short and long cracks, while collective behavior of short and long cracks can be reflected from the measured continuous average fatigue damage evolution based on the effective stress concept. The effectiveness of the model is verified by comparing numerical results with experimental data. The comparative results show that the developed model can be used to study the metal fatigue failure mechanisms from both macro- and micro-scale viewpoint. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：141 / 153
页数：13
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