| 提速货车钩尾框安全使用寿命的估算方法 |
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| 引用本文： | 刘青峰,任尊松,谢基龙,缪龙秀.提速货车钩尾框安全使用寿命的估算方法[J].中国安全科学学报,2003,13(8):56-59. |
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| 作者姓名： | 刘青峰 任尊松 谢基龙 缪龙秀 |
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| 作者单位： | 北方交通大学机械与电子控制工程学院 |
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| 摘 要： | 提出一种估算提速货车钩尾框安全使用寿命的方法。该方法基于损伤容限设计思想 ,通过子模型有限元技术和虚拟裂纹扩展方法 ,仿真应力集中区的裂纹及其扩展 ,应用能量释放率理论计算裂纹前沿的应力强度因子 ,由Paris公式估算在实测载荷谱下钩尾框的裂纹扩展寿命。估算结果与统计的使用寿命有较好的一致性
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| 关 键 词： | 钩尾框 子模型有限元技术 虚拟裂纹扩展 能量释放率 疲劳裂纹扩展寿命 |
| 修稿时间： | 2002年12月1日 |
Service Life Estimation for the Safety of the Coupler Yoke of Speed up Freight |
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| Liu Qingfeng,Ren Zunsong,Xie Jilong,Miao Longxiu.Service Life Estimation for the Safety of the Coupler Yoke of Speed up Freight[J].China Safety Science Journal,2003,13(8):56-59. |
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| Authors: | Liu Qingfeng Ren Zunsong Xie Jilong Miao Longxiu |
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| Abstract: | A predictive method for the safe service life of the coupler yoke of speed up freight is presented. Based on designing idea of damage tolerance, through the sub model finite element technology and virtual crack extension method, simulating cracks and their extension in the area of stress concentration, and applying the theory of energy release rate, the stress intensity factors of the crack front are calculated. The crack extension life of the coupler yoke under actual load spectrum is predicted with the Paris equation. The crack extension life predicted by this method is satisfactorily in compliance with the service life of the coupler yoke. |
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| Keywords: | Coupler yoke Sub model finite element technology Virtual crack extension Energy release rate Fatigue crack extension life |
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