期刊
ENGINEERING FRACTURE MECHANICS
卷 274, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfracmech.2022.108788
关键词
Linear hardening; V-notch; Elastic-plastic analysis; Singular stress; Asymptotic expansion; Stress intensity factor
类别
资金
- National Natural Science Foundation of China
- Natural Science Funds for Distinguished Young Scholar of Anhui Province of China
- China Scholarship Council
- [12172114]
- [2208085J25]
- [202006690032]
In this paper, a numerical method combining asymptotic expansion and boundary element method (CBEM) is developed to analyze the complete singular stress field of linear hardening elastic-plastic material with a V-notch. The method transforms the singularity analysis for the V-notch tip into an ordinary differential eigenvalue equation, which is then solved using the interpolating matrix method. The complete singular stress field and the notch stress intensity factors (SIFs) are obtained by coupling the asymptotic expansion of the elastic-plastic singular stresses with the boundary element method. The proposed approach is found accurate and effective in evaluating singular stress fields in a V-notch structure with linear hardening material.
In this paper, a general numerical method by the asymptotic expansion coupled the boundary element method (CBEM), considering the singular term and the higher order terms, is developed to analyze the complete singular stress field of linear hardening elastic-plastic material with a V -notch. The method firstly transforms the singularity analysis for the governing equation of the V -notch tip into an ordinary differential eigenvalue equation, which is then solved by the inter-polating matrix method. Then, the complete singular stress field and the notch stress intensity factors (SIFs) can be obtained by coupling the asymptotic expansion of the elastic-plastic singular stresses at the V-notch tip with the conventional boundary elements method for the remaining region of the structure. Two types of examples are analyzed for the V-notch problem of linear hardening material. It is shown that the elastic-plastic singular stress field can be evaluated by the equivalent Young's modulus and Poisson's ratio. The proposed new approach is found to be accurate and effective in evaluating singular stress fields in a V-notch structure with linear hardening material.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据