Surface crack growth prediction under fatigue load using the S-version Finite Element Model (S-FEM)

1st International Postgraduate Conference on Mechanical Engineering

工业技术（总论）;机械制造

Husnain, M.N.M.^1 ; Akramin, M.R.M.^1 ; Chuan, Z.L.^2

Faculty of Mechanical Engineering, Universiti Malaysia Pahang, Pekan, Pahang Darul Makmur

26600, Malaysia^1

Faculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Lebuhraya Tun Razak, Pahang Darul Makmur Gambang

26300, Malaysia^2

关键词: Catastrophic failures;    Fatigue crack growth simulations;    Fatigue life prediction;    Fatigue loadings;    Four point bending;    Semi-elliptical crack;    Simulation process;    Three point bending;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/469/1/012011/pdf
DOI  :  10.1088/1757-899X/469/1/012011

学科分类：工业工程学

来源: IOP

【 摘 要 】

Prediction of fatigue crack growth is one of the vital issues to prevent catastrophic failure from damage tolerance perspective. The surface of crack shape usually in semi-elliptical that maintained during the whole propagation. The investigation of this paper is to illustrate the surface crack growth that subjected to fatigue loading. The four-point bending and three-point bending have been simulated by using the S-version Finite Element Model (S-FEM). The simulation is conducted for aluminium alloys A7075-T6 and A2017-T3 with all of the parameters based on the previous experiment. The semi-elliptical crack shape is applied during the simulation process to represent with the reality of crack growth phenomena. Paris' Law model approach is presented in fatigue crack growth simulation. The S-FEM produced the surface crack growth and fatigue life prediction. The results of the S-FEM prediction then compared with the previous experiments. The results presented in a graph for comparison between S-FEM prediction with the experimental results. The S-FEM results obtained is good agreement with the experiment results.