Analysis of mixed-mode fatigue crack growth under stress redistribution at crack tips
(0) The experiments of mixed-mode I-II fatigue crack growth under stress redistribution at crack tips were conducted with compact specimens made of 16MnR steel. This test consisted of the 1st, the 2nd and 3rd step. When the crack reached a certain length in 1st step, the loading direction was switched to a certain angle. Finally, the loading direction was returned to the original orientation. The stress redistribution of mixed-mode fatigue was formed by altering the loading direction at propagating crack tips. A finite element analysis was also conducted to obtain the KⅠ, and KⅡ values, and then mixed-mode crack growth parameters were adopted to evaluate the crack growth rate and crack paths. The crack growth paths had a tendency perpendicular and across to the loading axis. Right after the loading direction was changed, the crack growth rate was decreased rapidly, and crack growth paths under the stress redistribution zone (SRZ) were affected.
Crack growth Loading angle Deflection angle Crack path Mixed-mode loading
Wenfeng Tu Zengliang Gao Zhaoji Hu
College of Environmental and Chemical Engineering, Nanchang University, Nanchang, China College of mechanical Engineering, Zhejiang University of Technology, Hangzhou, China
国际会议
大连
英文
552-555
2011-10-19（万方平台首次上网日期，不代表论文的发表时间）