| 客车直拉杆断裂分析 |
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| 引用本文： | 孙明正,王晓京,梁德玉.客车直拉杆断裂分析[J].理化检验(物理分册),2011(5):318-320. |
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| 作者姓名： | 孙明正 王晓京 梁德玉 |
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| 作者单位： | 上海材料研究所;歌美飒风电(天津)有限责任公司; |
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| 摘 要： | 通过宏观检验、化学成分分析、断口分析以及金相检验,对客车直拉杆断裂的原因进行了分析。结果表明:直拉杆的146°弯处在使用前存在微裂纹,在客车行驶过程中该直拉杆受交变应力的作用,微裂纹以疲劳的方式扩展,当扩展到一定程度,剩余截面不能承受外力作用时发生断裂。
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| 关 键 词： | 客车 直拉杆 交变应力 疲劳 微裂纹 |
Fracture Analysis of Tension Rod of Passenger Car |
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| SUN Ming-zheng,WANG Xiao-jing,LIANG De-yu Company Limited,Tianjin ,China.Fracture Analysis of Tension Rod of Passenger Car[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2011(5):318-320. |
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| Authors: | SUN Ming-zheng WANG Xiao-jing LIANG De-yu Company Limited Tianjin China |
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| Affiliation: | SUN Ming-zheng~1,WANG Xiao-jing~2,LIANG De-yu~2 (1.Shanghai Research Institute of Materials,Shanghai 200437,China,2.Gamesa(Tianjin)Company Limited,Tianjin 300384,China) |
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| Abstract: | The fracture reason of tension rod of passenger car was analyzed by means of macroscopic examination, chemical composition ana{ysis, fracture analysis and metallographie examination. The results showed that microcracks existed at 146° bend of the rod before use, and in the process of the passenger car running, the microcracks expanded by the way of fatigue under alternative stress, finally it fractured when the remaining section could not bear external force. |
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| Keywords: | passenger car tension rod alternative stress fatigue microcrack |
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