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首页> 外文期刊>Физико-химическая механика материалов: Науч.-техн. журн. >Probabilistic description of fatigue crack growth in a laser hardened medium carbon steel
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Probabilistic description of fatigue crack growth in a laser hardened medium carbon steel

机译：激光淬火中碳钢疲劳裂纹扩展的概率描述

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摘要

A modified model has been present in terms of a probabilistic approach to the crack growth description that applies a two-parameter Weibull distributioned. In comparison to the earlier proposal of the authors in this new one the applied stress level appears evidently in all derived equations. Fundamental for the description is a difference equation that models the crack growth. The method has been illustrated with an example of predicting the crack growth and fatigue life of laser hardened medium-carbon steel specimens under reversed torsion. Characteristic behaviour of fatigue crack growth and a fractographic peculiarities of the fracture surfaces in the treated specimens were analysed.
机译：根据概率方法对裂缝的增长进行了描述，该模型采用了两参数的威布尔分布。与作者在此新提案中的较早建议相比，所施加的应力水平显然出现在所有导出的方程式中。该描述的基础是一个模拟裂纹扩展的差分方程。举例说明了该方法的实例，该实例预测了反向扭转下激光淬火的中碳钢试样的裂纹扩展和疲劳寿命。分析了疲劳裂纹扩展的特征行为和处理后试样的断口形貌特征。

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