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Three-dimensional fracture and fatigue crack propagation analysis in structures with multiple cracks

机译:多裂纹结构的三维断裂与疲劳裂纹扩展分析

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A methodology is presented for fracture and fatigue crack growth simulations of multiple cracks. Computed stress intensity factors and a crack growth law are used to predict incremented positions of crack front nodes. The procedure is repeated until failure criterion is reached. The cases presented in this study include structures containing two or more cracks which propagate, coalesce or grow as planar and non-planar cracks. Comparisons of results with literature data shows excellent agreement. Therefore, it is concluded that the presented procedure can be used to accurately to assess fatigue crack propagation behavior of structures with multiple three-dimensional cracks. (C) 2015 Elsevier Ltd. All rights reserved.
机译:提出了一种用于多个裂纹的断裂和疲劳裂纹扩展模拟的方法。计算出的应力强度因子和裂纹扩展定律可用于预测裂纹前沿节点的位置增加。重复该过程,直到达到故障标准为止。在这项研究中提出的案例包括包含两个或多个裂纹的结构,这些裂纹以平面和非平面裂纹的形式传播,合并或增长。结果与文献数据的比较显示出极好的一致性。因此,可以得出结论,该程序可用于准确评估具有多个三维裂纹的结构的疲劳裂纹扩展行为。 (C)2015 Elsevier Ltd.保留所有权利。

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