DISLOCATION THEORY BASED MODELING FOR SHORT/SMALL CRACK GROWTH IN AIRCRAFT ALUMINUM ALLOYS

摘要：

This paper presents a study on dislocation theory based short/small crack modeling,and its application for fatigue life estimation of 2024-T351 aluminum alloys.An existing crack tip opening displacement (CTOD) model was modified to simulate microstructurally short crack growth by taking into account the effects of microstructural features,I.e.,grain size,grain boundary,and crack-nucleating particles.Based on this model,a Monte Carlo program was developed to estimate short crack growth life,and the analytical results matched the tests reasonably well.

关键词： Dislocation theory Short/small crack growth CTOD (crack tipopening displacement) Aluminum HOLSIP (Holistic Structural Integrity Process)

作者: Min Liao

作者单位: Senior Research Officer,Institute for Aerospace Research,National Research Council Canada,Ottawa,Ontario,Canada

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 386-389

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）