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《Journal of Dalian University of Technology》 2008-03
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Fracture analysis of multiple crack problems based on SBFEM

LIU Jun-yu,LIN Gao,DU Jian-guo(School of Civil and Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China)  
The stress intensity factor of multiple cracks problems is an important issue in elastic fracture mechanics.The scaled boundary finite element method(SBFEM) is proposed to deal with this kind of problem.The solution of stress intensity factor of mode I of multiple crack problems is presented.The whole domain is partitioned into several sub-domains according to the number of existing cracks. Each sub-domain has its own scaling center.At the same time,the characteristics of the SBFEM is preserved in each sub-domain.Numerical examples show that the SBFEM is effective with high accuracy in dealing with the multiple cracks fracture problems.It can be employed to treat the anisotropic medium easily.The results of the stress intensity factors of unequal double-edged cracks in orthotropic material are presented.The scope of application of the SBFEM has been extended.
【Fund】: 国家自然科学基金资助项目(重点项目90510018);; 教育部创新团队资助项目(IRT0518)
【CateGory Index】: O346.1
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