Analysis of Crack Growth Retardation after Single Overload Based on FEM Simulation and CORPUS Model Prediction

2017 International Symposium on Application of Materials Science and Energy Materials

材料科学;能源学

Zhang, Lina^1 ; Gao, Qianqian^1 ; Ma, Shaojun^1 ; Tong, Dihua^1

Beijing Institute of Aeronautical Materials, Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation, Aviation Key Laboratory of Science and Technology on Aeronautical Materials Testing and Evaluation, Beijing, China^1

关键词: Crack growth retardation;    Effective stress;    Equivalent plastic strain;    FEM simulations;    Model prediction;    Simulative calculations;    Single overloads;    Weight function method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/322/2/022003/pdf
DOI  :  10.1088/1757-899X/322/2/022003

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, the distribution of the residual stress and equivalent plastic strain along the crack surfaces of the current crack with the crack growth is presented by finite element calculation. The residual stress intensity factor Kreswas calculated by using the weight function method (WFM), and the effective stress range Seffduring the crack growth in the retardation zone is shown based the simulative calculation. Then, the effective stress rangeSeffwith different Rolhave been predicted by CORPUS model. The results indicate that the FEM simulative calculation and the CORPUS model prediction are agreement. They all show the crack growth retardation after an overload at different overload ratio Rol, and the effects of crack growth rate by the retardation.