A NEW CYCLIC J-INTEGRAL FOR LOW-CYCLE FATIGUE CRACK GROWTH

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A NEW CYCLIC J-INTEGRAL FOR LOW-CYCLE FATIGUE CRACK GROWTH

The constitutive equation under the low-cycle fatigue (LCF) was discussed,and a two-dimensional (2-D) model for simulating fatigue crack extension was put forward in order to propose a new cyclic J-integral. The definition, primary characteristics,physical interpretations and numerical evaluation of the new parameter were investigated in detail. Moreover, the new cyclic J-integral for LCF behaviors was validated by the compact tension (CT) specimens. Results show that the calculated values of the new parameter can correlate well with LCF crack growth rate, during constant-amplitude loading. In addition, the phenomenon of fatigue retardation was explained through the viewpoint of energy based on the concept of the new parameter.水利论文,t"T'\7g7N!Sn

作 者: HU Hong-jiu GUO Xing-ming LI Pei-ning XIE Yu-jun LI Jie  
作者单位:HU Hong-jiu,GUO Xing-ming,LI Jie(Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,Shanghai 200072, P. R. China)水利论文?x4}B)hm2n7j:|6q
LI Pei-ning,XIE Yu-jun(College of Mechanical Engineering, East China University of Science and Technology,Shanghai 200237, P. R. China) 
刊 名:应用数学和力学(英文版)  EI SCI
英文刊名:APPLIED MATHEMATICS AND MECHANICS(ENGLISH EDITION) 
年,卷(期):2006 27(2) 
分类号:O346.2 
关键词:cyclic J-integral   low-cycle fatigue   constitutive equation   numerical evaluation   fatigue retardation  
机标关键词:constitutive equationnumerical evaluationfatigue retardationcrack growth ratefatigue crackin order 
基金项目:the Municipal Key Subject Program of Shanghai 
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