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首页> 外文期刊>Engineering Fracture Mechanics >Evaluation of the probability distribution of crack propagation life in metal fatigue by means of probabilistic finite element method and B-models
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Evaluation of the probability distribution of crack propagation life in metal fatigue by means of probabilistic finite element method and B-models

机译:用概率有限元法和B模型评估金属疲劳裂纹扩展寿命的概率分布

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摘要

In this paper, a new model for the prediction of the cumulative distribution function of fatigue life of structural elements during the crack propagation stage is established. This problem is considered as a cumulative damage process following the probabilistic approach of Bogdanoff and Kozin (B-models). The initial and final crack lengths, the crack propagation angle, the material fracture and elastic parameters and the external loads have been the random variables considered here. The theoretical bases of the model and the procedure to construct it are described in the forthcoming paragraphs such as several examples for mode ! problems including the comparison with experimental results.
机译:本文建立了预测裂纹扩展阶段结构元件疲劳寿命累积分布函数的新模型。该问题被认为是遵循Bogdanoff和Kozin(B模型)的概率方法的累积破坏过程。初始和最终裂纹长度,裂纹扩展角度,材料断裂和弹性参数以及外部载荷是此处考虑的随机变量。该模型的理论基础和构建模型的过程将在随后的段落中进行介绍,例如有关模式的几个示例!问题包括与实验结果的比较。

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