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《Journal of Anhui University of Technology and Science》 2005-04
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A new criterion for crack propagation based on strain energy along radius from crack-tip within plastic zone

CHEN Ze-yu,LU Wen-ge,DU Jian-hui (Fac.of Elec.Engn.,Guangdong University of Technology,Guangzhou 510090,China)  
A new concept of strain energy along radius from crack tip within plastic zone is presented based on the analysis of deformation behavior of crack tip by the theory of fracture mechanics and plastic mechanics,and a new criterion of crack propagation is proposed.In order to avoid the singularities in energy integral in the criterion of crack propagation,a concept of critical intrinsic zone of crack propagation is introduced in this study.Through a comparison between the experimental data and those of other theories,the criterion of crack propagation proposed in the paper is sound and reasonable.
【Fund】: 国家自然科学基金资助项目(10272033)
【CateGory Index】: O346.1
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