| 重载列车E级钢钩舌疲劳裂纹扩展条件及寿命预测 |
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| 引用本文： | 李晓慧,谢基龙.重载列车E级钢钩舌疲劳裂纹扩展条件及寿命预测[J].北京交通大学学报(自然科学版),2006,30(4):102-104,108. |
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| 作者姓名： | 李晓慧 谢基龙 |
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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;北京交通大学,机械与电子控制工程学院,北京,100044 |
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| 摘 要： | 对重载列车E级钢钩舌进行了应力分析,导出了钩腕面裂纹的应力强度因子表达式.采用我国20 000 t列车车钩载荷谱,对钩腕面疲劳裂纹扩展的条件及扩展寿命进行了预测,并确定钩腕面裂纹的临界断裂尺寸,计算所得钩舌寿命与列车实际运行年限相一致.
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| 关 键 词： | 钩舌 扩展寿命 应力强度因子 扩展门槛值 临界裂纹尺寸 |
| 文章编号： | 1673-0291（2006）04-0102-03 |
| 收稿时间： | 2005-06-15 |
| 修稿时间： | 2005-06-15 |
Prediction of Fatigue Crack Growth Condition and Lifetime on Coupler Guard Arm Area of E Grade Steel of Burden Strain |
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| LI Xiao-hui,XIE Ji-long.Prediction of Fatigue Crack Growth Condition and Lifetime on Coupler Guard Arm Area of E Grade Steel of Burden Strain[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2006,30(4):102-104,108. |
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| Authors: | LI Xiao-hui XIE Ji-long |
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| Institution: | School of Mechanical and Electronic Control Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | The stress of E-grade steel coupler knuckle was analyzed and the expression of stress intensity factor of the cracks on the coupler knuckle wrist area was given. Adopting 20000t coupler knuckle load spectrum, the condition and lifetime of fatigue crack growth on the area of coupler guard arm were predicted. The critical facture dimension of cracks on the area of coupler guard arm was also calculated. The life calculated is in accord with the practice servicing life. |
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| Keywords: | coupler knuckle lifetime of fatigue crack growth stress intensity factor crack threshold value critical facture dimension |
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