3D effects on crack front core regions, stress intensity factors and crack initiation angles

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:50

Article

Khan, Shafique M. A.¹  Merah, Nesar¹  Adinoyi, Muhammad J.² 

[1] King Fahd Univ Petr & Minerals, Dept Mech Engn, Dhahran 31261, Saudi Arabia

[2] King Fahd Univ Petr & Minerals, Ctr Res Excellence Renewable Energy, Dhahran 31261, Saudi Arabia

关键词: SENT;    Mixed mode;    Crack initiation;    Stress intensity factors;    Core regions;   

DOI  :  10.1016/j.ijsolstr.2013.01.019

来源: Elsevier

【 摘 要 】

Results pertaining to three dimensional finite element analysis of a mixed mode edge crack in a tension specimen are presented. Considering three values for the crack inclination angle, the effect of thickness is investigated on the predicted crack tip plastic zone size, stress intensity factors and crack initiation angles at the surface and the mid plane. The crack initiation angles are calculated using two crack initiation criteria: MTS and R-criterion. In general, the effect of thickness is noted for low values of thickness over crack length ratio at the surface. The finite element results are optimized through mesh convergence and validated by experiments. The experimental set up is designed and used to measure the crack initiation angle in mixed mode SENT specimen and estimate the stress intensity factors for different crack inclination angles and specimen thicknesses. (C) 2013 Elsevier Ltd. All rights reserved.

【 授权许可】

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