| A NEW CYCLIC J-INTEGRAL FOR LOW-CYCLE FATIGUE CRACK GROWTH |
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| 作者姓名： | 胡宏玖 郭兴明 李培宁 谢禹钧 李洁 |
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| 作者单位： | Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 P. R. China，Shanghai Institute of Applied Mathematics and Mechanics Shanghai University，Shanghai 200072 P. R. China，College of Mechanical Engineering East China University of Science and Technology，Shanghai 200237 P. R. China，College of Mechanical Engineering East China University of Science and Technology，Shanghai 200237 P. R. China，Shanghai Institute of Applied Mathematics and Mechanics Shanghai University，Shanghai 200072 P. R. China |
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| 基金项目： | Project supported by the Municipal Key Subject Program of Shanghai (No.Y0103) |
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| 摘 要： | 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.
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| 关 键 词： | 循环J积分 疲劳裂纹 低周期疲劳 构成方程 数字评估 |
| 收稿时间： | 2005-08-23 |
| 修稿时间： | 2005-10-17 |
A new cyclic J-integral for low-cycle fatigue crack growth |
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| Hong-jiu Hu,Xing-ming Guo,Pei-ning Li,Yu-jun Xie,Jie Li.A NEW CYCLIC J-INTEGRAL FOR LOW-CYCLE FATIGUE CRACK GROWTH[J].Applied Mathematics and Mechanics(English Edition),2006,27(2):149-160. |
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| Authors: | Hong-jiu Hu Xing-ming Guo Pei-ning Li Yu-jun Xie Jie Li |
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| Institution: | 1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University,Shanghai 200072, P. R. China
2. College of Mechanical Engineering, East China University of Science and Technology,Shanghai 200237, P. R. China |
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| Abstract: | 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. |
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| Keywords: | cyclic J-integral low-cycle fatigue constitutive equation numerical evaluation fatigue retardation |
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