摘要
本文提出疲劳损伤单元概念,并使用非局部裂纹解对疲劳损伤单元进行了应力分析,从而导出单纯晶粒尺度变化情况剪切滑移机制门槛值公式:△K_(th)=A+Bd^(1/2),这与众多实验结果所得出的经验公式相吻合。对剪切滑移机制疲劳断裂的其它情况,门槛值公式可在上式基础上修正导出。
By using of nonlocal crack solution the stress acting on the fatigue damage element has been determined, thereby the threshold formula for the case of pure variation of grain size may be redused as.It is better agreed with the experimental results. For another case the threshold formula can be redused by help of modifing it.
出处
《合肥工业大学学报（自然科学版）》
CAS
CSCD
1989年第3期35-38,共4页
Journal of Hefei University of Technology：Natural Science
关键词
门槛区
疲劳损伤
模型
剪切滑移
fatigue damage, shear slip fracture mechanism
fatigue damage element
nonlocal theory
