The Creep Line-Spring Model : Estimates of Creep Fracture Parameters for Surface-Cracked Plates
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概要
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Extending the engineering approach for elastic-plastic fracture analysis(EPRI approach)to creep crack analysis, in this study we examine an engineering approach for estimating the displacement, crack-tip J and C integrals under nonsteady creep conditions. On the bases of the proposed engineering approach and the elastic-plastic line-spring method, a creep line-spring method is proposed and the fundamental equations are established. The creep line-spring method is used for estimating the creep fracture parameters for three-dimensional creep cracks. In order to check its accuracy, several surface-cracked plates under uniform tension are analyzed by the creep line-spring method and the three-dimensional finite-element method. The numerical results show that the creep line-spring method is in good agreement with the finite-element method and has the same accuracy as the common elastic-plastic line-spring method.
- 一般社団法人日本機械学会の論文
- 1999-10-15
著者
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Shiratori Masaki
Department Of Mechanical Engineering And Materials Science Yokohama National University
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GUOZHONG Chai
Department of Mechanical Engineering, Zhejiang University of Technology
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Guozhong Chai
Department Of Mechanical Engineering Zhejiang University Of Technology
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- The Creep Line-Spring Model : Estimates of Creep Fracture Parameters for Surface-Cracked Plates