| D级抽油杆疲劳裂纹扩展期剩余寿命预测 |
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| 引用本文： | 骆竞Xi 黄淑菊.D级抽油杆疲劳裂纹扩展期剩余寿命预测[J].石油机械,1995,23(12):27-31,35. |
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| 作者姓名： | 骆竞Xi 黄淑菊 |
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| 作者单位： | 西安交通大学金属材料强度国家重点实验室 |
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| 摘 要： | 测定了四种常用Ｄ级抽油杆用钢在空气和３．５％ＮａＣｌ水溶液腐蚀条件下的裂纹扩展速率，计算了当抽油杆存在不同尺寸可扩展裂纹时的剩余寿命。结果表明，当杆体上存在深０．１ｍｍ可扩展裂纹，使用应力为１１７．６～３７２．６ＭＰａ时，尚可工作两个月到两年。裂纹扩展期的扩展规律表明，任何一种能引入表面残余压应力的表面强化方法，都可以提高抽油杆的使用寿命。
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| 关 键 词： | 抽油杆，疲劳，裂纹，扩展速率，剩余寿命 |
Prediction of residual life of Grade D sucker rods with extending fatigue cracks |
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| Luo Jingxi,Huang Shuju.Prediction of residual life of Grade D sucker rods with extending fatigue cracks[J].China Petroleum Machinery,1995,23(12):27-31,35. |
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| Authors: | Luo Jingxi Huang Shuju |
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| Affiliation: | Luo Jingxi;Huang Shuju |
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| Abstract: | The extending rates of cracks on four kinds of steel commonly-used for Grade D sucker rods in air and 3.5% NCl-water solution are tested, and the residual lifes of the rods with extensible cracks of various sizes are calculated.The result of calculation shows that a rod with 0.1mm deep extensible carcks and under 117.6～372.6MPa stress can still be used for 2 months to 2 years. Any surface strengthening treatment resulting residual compressive stress onto the surface layer can improve the service life of the rod. |
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| Keywords: | sucker rod fatigue crack extending rate residual life |
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