| 面外弯矩下含局部减薄缺陷三通的塑性极限载荷分析 |
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| 引用本文： | 凌峰,陈钢,王飞,刘应华.面外弯矩下含局部减薄缺陷三通的塑性极限载荷分析[J].工程力学,2006,23(4):149-154. |
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| 作者姓名： | 凌峰 陈钢 王飞 刘应华 |
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| 作者单位： | 1. 清华大学工程力学系,北京,100084
2. 中国特种设备检测研究中心,北京,100013 |
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| 基金项目： | 中国科学院资助项目;全国高等学校优秀博士学位论文作者专项基金;国家科技攻关项目 |
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| 摘 要： | 采用弹塑性有限元方法,计算分析并验证了面外弯矩下无缺陷等径三通的塑性极限载荷,同时针对含局部减薄缺陷等径三通,系统地分析了局部减薄缺陷的尺寸、位置等因素对等径三通的塑性极限载荷的影响,得到了局部减薄对等径三通塑性极限载荷的影响规律,并分析了含局部减薄等径三通在面外弯矩下的典型失效模式,研究结果可为含局部减薄缺陷等径三通结构设计和安全评定提供理论依据。
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| 关 键 词： | 极限分析 弹塑性有限元法 等径三通 局部减薄 失效模式 |
| 文章编号： | 1000-4750（2006）04-0149-06 |
| 收稿时间： | 2004-04-19 |
| 修稿时间： | 2004-04-192004-06-15 |
PLASTIC LIMIT LOAD ANALYSIS OF T-JUNCTIONS OF PIPING WITH LOCAL WALL-THINNINGS UNDER OUT-OF-PLANE MOMENT |
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| LING Feng,CHEN Gang,WANG Fei,LIU Ying-hua.PLASTIC LIMIT LOAD ANALYSIS OF T-JUNCTIONS OF PIPING WITH LOCAL WALL-THINNINGS UNDER OUT-OF-PLANE MOMENT[J].Engineering Mechanics,2006,23(4):149-154. |
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| Authors: | LING Feng CHEN Gang WANG Fei LIU Ying-hua |
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| Affiliation: | 1. Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China; 2. Center of China Special Equipment Inspection and Research, Beijing 100013, China |
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| Abstract: | In this paper, the elasto-plastic finite element method is used to evaluate limit loads of the equal-diameter T-junctions of piping with local wall-thinnings under out-of-plane moment. Numerical examples of non-defective equal-diameter T-junctions of piping show that the computed results are in good agreement with available experimental data. The effects of the sizes and positions of local wall-thinnings on the plastic limit loads of equal-diameter T-junctions of piping are investigated. Some typical failure modes of the T-junctions with local wall-thinnings are studied. The results are expected to provide theoretical bases for the structural design and safety assessment of equal-diameter T-junctions of piping with local wall-thinnings. |
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| Keywords: | limit analysis elasto-plastic FEM equal-diameter T-junction of piping local wall-thinning failure mode |
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