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| 焊接结构疲劳破坏的若干问题 | |
| 引用本文： | 王若林,高巍,叶肖伟,倪一清.焊接结构疲劳破坏的若干问题[J].武汉大学学报(工学版),2013,46(2):194-198. |
| 作者姓名： | 王若林 高巍 叶肖伟 倪一清 |
| 作者单位： | 1. 武汉大学土木建筑工程学院,湖北武汉,430072 2. 武汉大学土木建筑工程学院,湖北武汉430072;香港理工大学深圳研究院,广东深圳518057 3. 香港理工大学深圳研究院,广东深圳,518057 |
| 摘 要： | 首先阐述了备受关注的钢结构疲劳破坏的危害性,从冶炼过程以及微观角度阐述钢材中疲劳裂纹的产生机理和分布的复杂性,并针对土木工程钢结构的焊接加热过程对材料的影响进行分析,阐述了焊接裂缝成为先天的"疲劳裂纹",从而加快焊接结构的疲劳破坏进程;总结前人研究得出的焊接残余应力的存在对焊接结构的疲劳强度的影响;最后提出了一些抗疲劳措施. |
| 关 键 词： | 焊接结构 疲劳破坏 疲劳裂缝 残余应力 |
Some issues of fatigue failure of welded structures |
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| WANG Ruolin,GAO Wei,YE Xiaowei,NI Yiqing.Some issues of fatigue failure of welded structures[J].Engineering Journal of Wuhan University,2013,46(2):194-198. | |
| Authors: | WANG Ruolin GAO Wei YE Xiaowei NI Yiqing |
| Affiliation: | 1.School of Civil and Architectural Engineering,Wuhan University,Wuhan 430072,China; 2.Shenzhen Research Institute of HongKong Polytechnic University,Shenzhen 518057,China) |
| Abstract: | This paper firstly states the perniciousness of widely concerned fatigue damage in steel structure;and then from the view of metallurgical process and microscopic structure states analyzes the engender mechanism and distribution complex of fatigue crack.For steel structure widely used in civil engineering,heating process during welding influence on the material is analyzed as well stated that the welding cracks in the weld defects are congenital "fatigue crack" which speeds up the process of fatigue failure of welded structures.The impact of the presence of welding residual stress on the fatigue strength of welded structures is summarized.Finally,some anti-fatigue measures are proposed. |
| Keywords: | welding structure fatigue damage fatigue crack residual stress |
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