| 疲劳短裂纹理论及寿命预测方法新进展 |
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| 引用本文： | 王璐,王正,宋希庚,王魁,赵子豪.疲劳短裂纹理论及寿命预测方法新进展[J].机械强度,2012(4):597-603. |
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| 作者姓名： | 王璐 王正 宋希庚 王魁 赵子豪 |
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| 作者单位： | 大连理工大学能源与动力学院 |
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| 基金项目： | 国家自然科学基金资助项目(50771024)~~ |
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| 摘 要： | 回顾短裂纹萌生和扩展机理、寿命预测以及短裂纹行为模拟方面的最新进展,侧重介绍疲劳短裂纹行为的统计模拟方法,马尔可夫链模型、威布尔分布函数、群体疲劳短裂纹的蒙特卡罗模拟和分形方法,以及应用蒙特卡罗方法及分形方法对低碳钢高温低周疲劳短裂纹行为所进行的模拟。对于基于BP(back propagation)神经网络的统计方法在疲劳短裂纹方面的应用也给予一定的介绍。
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| 关 键 词： | 疲劳 表面短裂纹 寿命预测 蒙特卡罗模拟 分形 |
REVIEW ON THEORY AND LIFE PREDICTION METHODS OF SHORT FATIGUE CRACKS |
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| WANG Lu,WANG Zheng,SONG XiGeng WANG Kui,ZHAO ZiHao.REVIEW ON THEORY AND LIFE PREDICTION METHODS OF SHORT FATIGUE CRACKS[J].Journal of Mechanical Strength,2012(4):597-603. |
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| Authors: | WANG Lu WANG Zheng SONG XiGeng WANG Kui ZHAO ZiHao |
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| Affiliation: | (School of Energy and Power Engineering,Dalian University of Technology,Dalian 116023,China) |
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| Abstract: | The latest improvements on the initiation and propagation mechanism of the short fatigue cracks,life evaluation and short fatigue crack behavior simulation were reviewed.The statistical simulation methods of short fatigue crack behavior,including Markov Chain model,Weibull function method,Monte Carlo method and fractal method were discussed emphatically,and also short fatigue crack behavior simulation results of low carbon steel at high temperature under low cycle fatigue based on Monte Carlo method and fractal method separately were given.The application of statistical method based on BPANNs(back propagation artificial neural networks) simulation was also briefly introduced. |
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| Keywords: | Fatigue Surface short cracks Life evaluation Monte Carlo method Fractal |
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