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| 抽油杆疲劳裂纹形状比变化规律 | |
| 引用本文： | 姚红星,冯珩,石惠宁,丁建东. 抽油杆疲劳裂纹形状比变化规律[J]. 力学与实践, 2005, 27(4): 32-34 |
| 作者姓名： | 姚红星 冯珩 石惠宁 丁建东 |
| 作者单位： | 1. 中国石油天然气股份有限公司华北油田分公司采油工艺研究院,河北,任丘,062552;中国科学院力学研究所,北京,100080 2. 中国科学院力学研究所,北京,100080 3. 中国石油天然气股份有限公司华北油田分公司采油工艺研究院,河北,任丘,062552 |
| 基金项目： | 国家自然科学基金（19872056）项目资助. |
| 摘 要： | 采用断裂力学方法研究了抽油杆杆体疲劳裂纹形状比在扩展过程中的变化规律，证明无论初始形状如何，抽油杆杆体疲劳裂纹形状比在扩展过程中趋于同一个稳定数值．通过裂纹扩展实验对直径为15．9mm的抽油杆疲劳裂纹形状比进行了实验测定，发现其裂纹形状比迅速靠近0．78． |
| 关 键 词： | 断裂力学 抽油杆 杆体疲劳裂纹 扩展过程 变化规律 |
| 收稿时间： | 2004-10-09 |
| 修稿时间： | 2004-12-20 |
THE SHAPE RATIO OF FATIGUE CRACKS ON SUCKER ROD |
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| YAO Hongxing,FENG Heng,SHI Huining,Ding Jiandong. THE SHAPE RATIO OF FATIGUE CRACKS ON SUCKER ROD[J]. Mechanics and Engineering, 2005, 27(4): 32-34 | |
| Authors: | YAO Hongxing FENG Heng SHI Huining Ding Jiandong |
| Affiliation: | Production Technology Research Institute of Huabei Oilfield Company, Renqiu 062552, China;Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China |
| Abstract: | The relation between shape ratio and depth of fatigue crack on sucker rod is studied using fracture mechanics. The results show that the shape ratio of fatigue cracks with different depth will develop toward a stable value approximatively for whatever initial shape. The crack extension test is carried out to determine the asymptotic shape ratio of the fatigue crack, and specimens made of 20CrMo with circular section are used. A linear fitting line is obtained from the experimental data and the shape ratio of fatigue crack on sucker rod with diameter of 15.9 mm is determined to be 0.78. |
| Keywords: | sucker rod fatigue crack shape ratio crack extension |
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