| 关于累积疲劳损伤定则 |
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| 引用本文： | 郑修麟,吕宝桐,凌超,陈德广.关于累积疲劳损伤定则[J].航空学报,1993,14(10):484-489. |
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| 作者姓名： | 郑修麟 吕宝桐 凌超 陈德广 |
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| 作者单位： | 西北工业大学401教研室,西安 710072 |
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| 基金项目： | 国家教委博士点基金，航空科学基金 |
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| 摘 要： | 根据实验结果和分析表明,Miner定则可用于变幅载荷下始裂寿命的估算,但要考虑载荷谱中大、小载荷交互作用。载荷交互作用效应可用疲劳裂纹起始的超载效应因子予以定量地表征。裂纹起始的超载效应取决于材料的应变硬化特性、构件几何以及超载的大小。因此,应视具体情况使用Miner定则。在始裂寿命占疲劳寿命主要部分的情况下,Miner定则可近似地用于估算疲劳寿命。
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| 关 键 词： | Miner定则 载荷交互作用 始裂寿命 超载效应因子 寿命估算 |
| 收稿时间： | 1991-11-25 |
| 修稿时间： | 1992-05-11 |
ON THE RULE FOR ACCUMULATIVE FATIGUE DAMAGE |
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| Zheng Xiu-lin,Lu Bao-tong,Lin Chao,Chen De-guang.ON THE RULE FOR ACCUMULATIVE FATIGUE DAMAGE[J].Acta Aeronautica et Astronautica Sinica,1993,14(10):484-489. |
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| Authors: | Zheng Xiu-lin Lu Bao-tong Lin Chao Chen De-guang |
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| Institution: | Faculty 401, Northwestern Polytechnical University, xi'an, 710072 |
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| Abstract: | Based on the fatigue test results and analysis, it is shown that Miner's rule could be applied to predicting the fatigue crack initiation (FCI) life of elements under variable amplitude loading, but the effect of the interaction between loads in the load spectrum should be taken into account. The effect of the interaction between loads can be quantitatively characterized by the factor of overloading effect in FCI. The overloading effect in FCI depends upon the character of strain hardening of metals, the geometry of elements and the magnitude of overloading. Therefore, the reasonable application of Miner's rule depends on the given service conditions of the elements. In case that the FCI life occupies the main portion of fatigue life, Miner's rule can be approximately used to predict the fatigue life of elements under variable amplitude loading- |
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| Keywords: | Miner's rule effect of interaction between loads FCI life factor of overloading effect life prediction |
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