| 铜镁合金接触线低周疲劳分析 |
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| 引用本文： | 覃作祥,李克欣,陆兴.铜镁合金接触线低周疲劳分析[J].大连交通大学学报,2012,33(1):69-71,75. |
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| 作者姓名： | 覃作祥 李克欣 陆兴 |
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| 作者单位： | 大连交通大学材料科学与工程学院,辽宁大连,116028 |
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| 摘 要： | 通过采用不同塑性应变幅控制,对冷拔铜镁合金接触线进行室温低周疲劳试验.结果表明,随着循环周次的增加,发生循环软化现象.应力降低速率随着应变的降低而减缓.通过Manson-coffin公式估算出接触线用铜镁合金的低周疲劳寿命,得出应变-寿命关系,并指过渡寿命NT所在应变范围.
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| 关 键 词： | 低周疲劳 铜镁合金 接触线 疲劳寿命 |
Study on Low Cycle Fatigue of Cu-Mg Alloy Contact Wire |
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| QIN Zuo-xiang,LI Ke-xin,LU Xing.Study on Low Cycle Fatigue of Cu-Mg Alloy Contact Wire[J].Journal of Dalian Jiaotong University,2012,33(1):69-71,75. |
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| Authors: | QIN Zuo-xiang LI Ke-xin LU Xing |
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| Institution: | (School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China) |
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| Abstract: | Using different plastic strain amplitude,low cycle fatigue of cold drawn Cu-Mg alloy contact wire was studied at room temperature.The results show that,with the increase of cycles,cyclic softening phenomenon is occurred.The rate of stress reduction with the strain is reduced slowing.By using Manson-coffin formula to estimate the low cycle fatigue life of Cu-Mg alloy contact wire,the strain-life relationship is obtained,and the strain range of the transition life NT is indicated. |
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| Keywords: | low-cycle fatigue contact wire Cu-Mg alloy fatigue life |
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