| 主起落架外筒周向疲劳裂纹扩展计算方法研究 |
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| 引用本文： | 高金华,李本旭,刘锐琛.主起落架外筒周向疲劳裂纹扩展计算方法研究[J].航空学报,1994,15(2):228-231. |
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| 作者姓名： | 高金华 李本旭 刘锐琛 |
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| 作者单位： | 中国民航学院 |
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| 摘 要： | 基于平板表面裂纹应力强度因子的表达式及圆筒穿透裂纹的鼓胀系数,提出了支柱外筒周向表面裂纹的鼓胀系数反应力强度因子计算方法。还介绍了在工作环境中所用计算疲劳裂纹扩展公式。
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| 关 键 词： | 起落架 圆柱体 裂纹扩展 |
GROWTH CALCULATION OF CIRCULAR FATIGUE CRACK ON MAIN LANDING GEAR SHOCK ABSORBING CYLINDER |
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| Gao jinhua.GROWTH CALCULATION OF CIRCULAR FATIGUE CRACK ON MAIN LANDING GEAR SHOCK ABSORBING CYLINDER[J].Acta Aeronautica et Astronautica Sinica,1994,15(2):228-231. |
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| Authors: | Gao jinhua |
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| Institution: | 1. CiviL Aviation Institute of China,Tianjin,300300;2. Box 394 of Chengdu,Chengdu,610041 |
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| Abstract: | t was found in fatigue experiments to main landing gears that circular surface cracks occur on the shock absorbing cylider of the struts and propagate rapidly. For estimating the propagtion life of the cracks this paper presents calculating methods of a swell factor and stress intensity factor of circular surface cracks on the cylinder. These are based on formulas of stress intensity factors of surface cracks of plates and swell factors of through cracks of cylinders. This paper recommends calculating formulas of fatigue crack propagation in service environment and gives relevant parameters’ values of 30CrMnSiNi2A. |
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| Keywords: | landing gear cylinder crack propagation |
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