文献类型：期刊文献

英文题名：Numerical investigation of stress concentration factor at irregular corrosion pit under tension-torsion loading

作者：Huang, Yuhui[1]; Wang, Chengcheng[1]; Tu, Shan-Tung[1]; Xuan, Fu-Zhen[1]; Itoh, Takamoto[2]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Faculty of Science and Engineering, Ritsumeikan University, Shiga, 525-8577, Japan

年份：2014

卷号：6A

外文期刊名：American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP

收录：EI(收录号：20144800264375)

语种：英文

外文关键词：Torsional stress - Finite element method - Stress analysis - Stress concentration - Aspect ratio - Pitting

摘要：Finite element analysis is adopted to study the stress concentration of pit area under tension-torsion loading. The stress concentration factors under regular evolution and irregular evolution of pits are investigated by conducting a series of three-dimensional semi-elliptical pitted models. Based on the finite element analysis, it can be concluded that pit aspect ratio (a/2c) is a significant parameter affecting stress concentration factor (SCF) for regular evolution pits. Pits, having higher aspect ratio, are very dangerous form and can cause significant reduction in the load carrying capacity. When local dissolution occurs in the pitting area, SCF will have a sharp increase, it is more probable for a crack to initiate from these areas compared with pits for regular evolution. Furthermore, local dissolution coefficient is proposed to study effect of local dissolution within the pit on SCF. Copyright ? 2014 by ASME.