| 断口定量分析840D车轮辐板孔裂纹扩展速率 |
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| 引用本文： | 刘丰收,习年生,付秀琴,刘鑫贵,陈朝阳.断口定量分析840D车轮辐板孔裂纹扩展速率[J].铁道机车车辆,2006,26(3):20-22. |
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| 作者姓名： | 刘丰收 习年生 付秀琴 刘鑫贵 陈朝阳 |
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| 作者单位： | 1. 铁道科学研究院,铁道科学技术研究发展中心,北京,100081
2. 铁道科学研究院,金属及化学研究所,北京,100081 |
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| 摘 要： | 对840D车轮辐板孔疲劳断口形貌进行观察并测量疲劳弧线间距。通过分析认为43 mm是临界裂纹的一个重要参考,同时发现闸瓦制动工况在裂纹的产生和扩展过程中起着重要的作用,并推断出裂纹长度在35 mm内,其平均裂纹扩展速率为31.2 mm/年。
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| 关 键 词： | 840D车轮 裂纹扩展速率 临界裂纹长度 |
| 文章编号： | 1008-7842（2006）03-0020-02 |
| 收稿时间： | 2005-08-29 |
| 修稿时间： | 2005年8月29日 |
Fractography Retroestimating Crack Growth Rate of 840D Wheel Web Hole |
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| LIU Feng-shou,XI Nian-sheng,FU Xiu-qin,LIU Xin-gui,CHEN Zhao-yang.Fractography Retroestimating Crack Growth Rate of 840D Wheel Web Hole[J].Railway Locomotive & Car,2006,26(3):20-22. |
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| Authors: | LIU Feng-shou XI Nian-sheng FU Xiu-qin LIU Xin-gui CHEN Zhao-yang |
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| Abstract: | The fracture surfaces of 840D wheel web with a hole have been investigated and the intervals of fatigue line also have been measured.35mm is regarded as a importance referenced length of critical crack length by analysis.It is founded that brake situation has a very important influence on formation and growth of cracks.Crack growth rate is also calculated and the calculation shows that its average is 31.2?mm/year for crack length in 35?mm. |
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| Keywords: | 840D wheel crack growth rate critical crack length |
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