| 重载货车钩舌裂纹应力强度因子分析 |
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| 引用本文： | 薛海,李强,石晓玲.重载货车钩舌裂纹应力强度因子分析[J].北京交通大学学报(自然科学版),2016,40(6). |
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| 作者姓名： | 薛海 李强 石晓玲 |
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| 作者单位： | 北京交通大学 机械与电子控制工程学院，北京 100044;兰州交通大学 机电工程学院，兰州 730070;北京交通大学 机械与电子控制工程学院,北京,100044 |
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| 基金项目： | 中国铁路总公司科技研究开发计划项目资助(2015J007-M)，兰州交通大学青年科学基金资助项目(2014020) |
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| 摘 要： | 服役条件的恶化和铸造缺陷的存在导致重载货车钩舌大量出现裂纹.根据实际应用中钩舌裂纹的出现位置和宏观形态,建立了含裂纹的钩舌有限元模型.采用相互作用积分法分析了牵引面水平中心线位置处、水平中心线附近及沿水平中心线处裂纹前缘的应力强度因子,并结合裂纹区不同位置处应力的变化特征,分析了应力对裂纹应力强度因子的影响.结果表明,牵引面处裂纹前缘的应力强度因子与裂纹位置和裂纹形状比有关,且相对于裂纹尺寸,应力对应力强度因子的影响更大.
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| 关 键 词： | 重载货车 钩舌 相互作用积分法 应力强度因子 |
Analysis of stress intensity factor on heavy wagon's coupler knuckle |
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| XUE Hai,LI Qiang,SHI Xiaoling.Analysis of stress intensity factor on heavy wagon's coupler knuckle[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2016,40(6). |
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| Authors: | XUE Hai LI Qiang SHI Xiaoling |
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| Abstract: | The deterioration of service conditions and the existence of casting defects lead to a lot of cracks on heavy wagon's coupler knuckles.A coupler knuckle's finite element model with cracks was established according to the location and morphology of cracks in practical application.The stress intensity factors of crack fronts on the horizontal center line,along the horizontal center line and near the horizontal center line of pulling face were analyzed based on interaction integral method,and the affects of stress on stress intensity factors of cracks were studied.The results show that the stress intensity factors of crack fronts are related to crack location and crack shape ratio.Compared with crack size,the stress of pulling face has greater influence on the stress in-tensity factor. |
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| Keywords: | heavy wagon coupler knuckle interaction integral method stress intensity factor |
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