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A comparison of stress intensity factors obtained through crack closure integral and other approaches using eXtended element-free Galerkin method |
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| Authors: | N Muthu S K Maiti B G Falzon I Guiamatsia |
| Affiliation: | 1. IITB-Monash Research Academy, IIT Bombay, CSE Building, 2nd Floor, Powai, 400076, India 2. Department of Mechanical Engineering, IIT Bombay, Powai, 400076, India 3. Department of Mechanical and Aerospace Engineering, Monash University, Clayton, VIC, 3800, Australia 4. School of Mechanical and Aerospace Engineering, Queen’s University, Belfast, BT9 5AH, UK 5. School of Civil Engineering, The University of Sydney, Sydney, NSW, 2006, Australia |
| Abstract: | In this paper, a new approach for extracting stress intensity factors (SIFs) by the extended element-free Galerkin method, through a crack closure integral (CCI) scheme, is proposed. The CCI calculation is used in conjunction with a local smoothing technique to improve the accuracy of the computed SIFs in a number of case studies of linear elastic fracture mechanics. The cases involve problems of mixed-mode, curved crack and thermo-mechanical loading. The SIFs by CCI, displacement and stress methods are compared with those based on the M-integral technique reported in the literature. The proposed CCI method involves very simple relations, and still gives good accuracy. The convergence of the results is also examined. |
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