| 三维钝裂纹的边界元模拟和剩余腐蚀疲劳寿命估算方法 |
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| 引用本文： | 张永元,阮国华.三维钝裂纹的边界元模拟和剩余腐蚀疲劳寿命估算方法[J].航空学报,1994,15(3):269-274. |
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| 作者姓名： | 张永元 阮国华 |
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| 作者单位： | 上海交通大学工程力学系 |
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| 基金项目： | 上海市科委自然科学基金 |
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| 摘 要： | 提出了一个三维钝裂纹的计算模型,并建立了适用于这类模型的边界元法程序。还利用现有的疲劳裂纹扩展模型,对含三维钝裂纹构件的剩余疲劳寿命估算方法进行了讨论,并对三维钝裂纹在空气和海水中的扩展进行了计算。研究表明,本方法和边界元程序,既适用于三维尖裂纹的剩余寿命估算,也适用于三维钝裂纹的剩余疲劳寿命估算。
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| 关 键 词： | 三维钝裂纹 应力腐蚀疲劳 应力强度因子 裂纹扩展速率 |
BOUNDARY ELEMENT METHOD SIMULATION AND CORROSION FATIGUELIFE PREDICTION FOR 3-D BLUNT CRACKS |
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| Zhang Yongyuan, Ruan Guohua.BOUNDARY ELEMENT METHOD SIMULATION AND CORROSION FATIGUELIFE PREDICTION FOR 3-D BLUNT CRACKS[J].Acta Aeronautica et Astronautica Sinica,1994,15(3):269-274. |
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| Authors: | Zhang Yongyuan Ruan Guohua |
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| Institution: | Department of Engineering Mechanics,Shanghai Jiaotong University,Shanghai,200030 |
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| Abstract: | A calculation model for 3-D blunt cracks in proposed and the corresponding boundary element method(BEM)computer program system is also established.The corrosion fatigue life calculation method for components with 3-D blunt crack is discussed using available model for fatigue crack growth.Calculations are for 3-D plates with surface blunt crack in air and in sea water.The results show that both the method and the BEM program proposed are val-id for both fatigue growth ofsharp cracks and fatigue growth of 3-D blunt cracks. |
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| Keywords: | D blunt crack stress-corrosion fatigue boundary element method(BEM) stress intensity factor(SIF) |
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