J-lntegral Analysis of Surface Cracks in Round Bars under Combined Loadings
This paper presents a non-linear numerical investigation of surface cracks in round bars under combined bending and torsion loadings by using ANSYS finite element analysis (FEA). Due to the nonsymmetrical analysis, a full finite element (FE) model was constructed and special attention was given at the crack tip of the cracks. The surface cracks were characterized by the dimensionless crack aspect ratio, a/b = 0.6,0.8, 1.0 and 1.2, while the dimensionless relative crack depth, a/D = 0.1, 0.2 and 0.3. The square-root singularity of stresses and strains was modeled by shifting the mid-point nodes to the quarter-point locations in the region around the crack front. The proposed model was validated with the existing model before any further analysis. The elastic-plastic analysis under the loading was assumed to follow the Ramberg-Osgood relation with strain hardening exponent, n = 5 and 10.J values were determined for all positions along the crack front and then, the limit load was predicted using the J values obtained from FEA through the reference stress method.
J-lntegral Limit Load Finite Element Analysis Surface Crack Stress Intensity Factor
A.E Ismail A.K Ariffin S. Abdullah M.J Ghazali R. Daud
Dept. of Engineering Mechanics,Faculty of Mechanical & Manufacturing Engineering,Universiti Tun Huss Dept. of Mechanical & Materials Engineering,Faculty of Engineering & Built-Environment,Universiti Ke
国际会议
the 2011 International Conference on Key Engineering Materials(ICKEM 2011)(2011关键工程材料国际会议)
三亚
英文
187-191
2011-03-25（万方平台首次上网日期，不代表论文的发表时间）