| 考虑不同载荷顺序下应力损伤模糊性的Miner法则 |
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| 引用本文： | 王旭亮,聂宏.考虑不同载荷顺序下应力损伤模糊性的Miner法则[J].南京航空航天大学学报(英文版),2008,25(3):182-186. |
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| 作者姓名： | 王旭亮 聂宏 |
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| 作者单位： | 南京航空航天大学航空宇航学院,南京,210016,中国 |
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| 摘 要： | 针对传统Miner法则无法考虑载荷加载顺序的缺陷，应用模糊理论分析了不同载荷顺序下疲劳极限附近的应力对构件造成疲劳损伤的模糊性，使修正后的模糊Miner理论能够较好地反映出载荷加载顺序对疲劳寿命的影响。算例分析结果表明，该方法可使疲劳寿命的预测误差由原来的61．6％减小到21．7％。
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| 关 键 词： | 疲劳损伤 模糊理论 隶属函数 载荷加载顺序 Miner法则 |
MINER RULE CONSIDERING FUZZINESS OF STRESS DAMAGE UNDER DIFFERENT LOAD SEQUENCES |
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| Wang Xuliang,Nie Hong.MINER RULE CONSIDERING FUZZINESS OF STRESS DAMAGE UNDER DIFFERENT LOAD SEQUENCES[J].Transactions of Nanjing University of Aeronautics & Astronautics,2008,25(3):182-186. |
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| Authors: | Wang Xuliang Nie Hong |
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| Institution: | (College of Aerospace Engineering, NUAA, 29 Yudao Street, Nanjing, 210016, P. R. China) |
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| Abstract: | Since the traditional Miner rule ignores the influence of the load sequence on the fatigue life,the fuzzy rules are used to analyze the fuzziness of the fatigue damage caused by the stress nearby the fatigue limit under different load sequences.The improved fuzzy Miner rule can reflect the influence of the load sequence on the fatigue life.Results of the example show that the prediction error can be reduced from 61.6% to 21.7%. |
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| Keywords: | fatigue damage fuzzy rules membership functions load sequence Miner rule |
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