| 椭圆状裂纹应力强度因子确定及抽油杆疲劳寿命预测 |
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| 引用本文： | 石随林,石德珂.椭圆状裂纹应力强度因子确定及抽油杆疲劳寿命预测[J].军械工程学院学报,1996(3). |
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| 作者姓名： | 石随林 石德珂 |
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| 作者单位： | 军械工程学院金工教研室，西安交通大学热处理教研室 石家庄 050003，西安 710049 |
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| 摘 要： | 借助实验数据和公式逼近得到了带有椭圆状裂纹,承受拉-拉载荷的抽油杆的应力强度因子。将此应力强度因子代入Paris公式,即可预测抽油杆的剩余疲劳寿命。计算表明,当抽油杆上初始裂纹尺寸α_0<1.90mm时,预测疲劳寿命与实验值可较好地吻合。
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| 关 键 词： | 抽油杆 椭圆状裂纹 应力强度因子 疲劳 疲劳寿命 |
THE COMPUTING OF STRESS INTENSITY FACTOR OF ELLIPTICAL CRACKS AND THE PREDICTING OF FATIGUE LIFETIME OF SUCKERS RODS |
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| Shi Suilin.THE COMPUTING OF STRESS INTENSITY FACTOR OF ELLIPTICAL CRACKS AND THE PREDICTING OF FATIGUE LIFETIME OF SUCKERS RODS[J].Journal of Ordnance Engineering College,1996(3). |
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| Authors: | Shi Suilin |
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| Institution: | Shi Suilin (Ordnance Engineering College)Shi Deke (Xi'an Jiaotong University) |
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| Abstract: | Abstract A new method computing stress intensity factor of a elliptical crack in sucker rods subjected to tensile loading is proposed. Substituting this stress intensity factor into Paris expression obtained by experiment, a prediction of remaining fatigue lifetime for a sucker rod is calculated. If a initial crack size(a0) in sucker rods is shorter than the size about 1.90mm, the predicting lifetime will show a good agreement with testing lifetime. |
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| Keywords: | sucker rods elliptical crack fatigue stress intensity facor fatigue lifetime |
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