| 蠕变局部损伤开裂的有限元模型 |
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| 引用本文： | 周斌生,汤晓英,王正东,吴东棣. 蠕变局部损伤开裂的有限元模型[J]. 华东理工大学学报(自然科学版), 2001, 27(3): 297-300 |
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| 作者姓名： | 周斌生 汤晓英 王正东 吴东棣 |
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| 作者单位： | 华东理工大学机械工程学院,;华东理工大学机械工程学院,;华东理工大学机械工程学院,;华东理工大学机械工程学院, |
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| 摘 要： | 建立了蠕变局部损伤法模型,并给出单元进入损伤态的判据和失效的临界拉伸应变条件,局部蠕变损伤理论的实质就是试样是多种不同蠕变性能材料的统一,并由蠕变应力再分布得到证实,应用有限元对双缺口圆试样作了蠕变局部损伤分析,启裂时间和断裂蠕变应变值均与实验结果相吻合。
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| 关 键 词： | 局部损伤 损伤应变门槛值 启裂时间 应力再分布 |
| 文章编号： | 1006-3080(2001)03-0297-04 |
| 修稿时间： | 2000-07-24 |
A Finite Element Model of Local Damage in Creep Rupture |
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| ZHOU Bin sheng ,TANG Xiao ying,WANG Zheng dong,WU Dong di. A Finite Element Model of Local Damage in Creep Rupture[J]. Journal of East China University of Science and Technology, 2001, 27(3): 297-300 |
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| Authors: | ZHOU Bin sheng TANG Xiao ying WANG Zheng dong WU Dong di |
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| Affiliation: | ZHOU Bin sheng *,TANG Xiao ying,WANG Zheng dong,WU Dong di |
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| Abstract: | This paper presents a finite element model of local damage in creep and provides the threshold strain for damage elements. The essence of localized damage theory is that materials could be divided into several different groups with different creep damage and proved by stress redistribution. Calculation has been made on a double V notched bar. The crack initiation time and rupture creep strain are coincided with the experimental results. |
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| Keywords: | local damage strain threshold crack initiation time stress redistribution |
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