摘要
研究了不同应力比的二线热应力疲劳试验并进行了数值分析。结果表明:热疲劳裂纹的形态决定于两个主应力的比和两个主塑性应变的比;直线型裂纹的方向垂直于最大主应力方向;两个主应力的值和两个主塑性应变值相近时出现网状龟裂。
The experiment and numerical analysis of biaxial thermal stress fatigue under various stress ratio.The results show that the morphology of thermal fatigue cracks depend on both ratio of two principal stresses and ratio of two principal plastic stress, and the direction of straiight crack is perpendicular to the direction of maximum principal stress. Netty thermal fatigue crack will occurs when two principal stress and two principal plastic strains are approximately equal to each other.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1991年第3期286-290,共5页
Journal of University of Science and Technology Beijing
基金
冶金部基础研究基金
关键词
热疲劳
裂纹
热应力
疲劳
fatigue, thermal fatigue, thermal stress fatigue, thermal fatigue test
