| 局部应变法预测飞机结构带孔部件疲劳寿命 |
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| 引用本文： | 童第华,陈志伟.局部应变法预测飞机结构带孔部件疲劳寿命[J].航空材料学报,2011,31(5):86-90. |
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| 作者姓名： | 童第华 陈志伟 |
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| 作者单位： | 1. 北京航空材料研究院,北京,100095
2. 北京航空工程研究中心,北京,100076 |
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| 摘 要： | 介绍了应用Levenberg-Marquardt迭代法计算局部应力和局部应变的工作.Levenberg-Marquardt迭代法是求解超越方程的一种常用数学方法,但是缺点是程序比较复杂,计算效率较低,因此本文目的是找到一种程序实现简单、计算效率高、计算精度满足要求的计算方法,选择了二分法,并且对比分析了二分法和Leve...
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| 关 键 词： | 局部应力应变法 Levenberg-Marquardt迭代法 二分法 应变寿命方程 平均应力修正 |
Fatigue Life Evaluation on Plane Structural Parts with Holes through Local Strain Method |
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| TONG Di-hua,CHEN Zhi-wei.Fatigue Life Evaluation on Plane Structural Parts with Holes through Local Strain Method[J].Journal of Aeronautical Materials,2011,31(5):86-90. |
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| Authors: | TONG Di-hua CHEN Zhi-wei |
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| Institution: | TONG Di-hua1,CHEN Zhi-wei2(1.Beijing Institute of Aeronautical Materials,Beijing 100095,China,2.Beijing Aeronautical Technology Research Center,Beijing 100076,China) |
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| Abstract: | The thesis introduces the work of calculating local stress and local strain by application of Levenberg-Marquardt's iteration method.As an usual mathematical method to solve super equation,Levenberg-Marquardt's iteration method has some disadvantages such as complicated program,low computing efficiency.Therefore,the paper aims to find out a comparatively simple,high efficient and high precision computing method.Through comparing and analyzing the efficiency and precision of dichotomy and Levenberg-Marquardt... |
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| Keywords: | local stress and local strain Levenberg-Marquardt's iteration method dichotomy strain life equation mean stress correction |
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