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Analysis of arbitrary shaped three-dimensional cracks by using a virtual crack-closure integral method (VCCM) for tetrahedral finite element

机译:四面体有限元虚拟裂纹闭合积分法(VCCM)分析任意形状的三维裂纹

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This paper describes the development of a software to perform three-dimensional crack propagation analyses.The software is based on the conventional finite element method with second order tetrahedral element and an automatic mesh generation software.Hexahedral finite elements have historically been used in fracture analyses and methodologies to compute the crack parameters have been developed for the hexahedral elements.In present research,the authors have developed a VCCM (virtual crack closure-integral method) for the second order tetrahedral finite element.Use of the tetrahedral element allows us to utilize an automatic mesh generation software.The direction and rate of crack propagation are predicted based on the stress intensity factors and the shape of crack is updated.Hence,a software package containing the modules for mesh generation,for finite element analysis,for stress intensity factor evaluation,for predicting the rate and the direction of crack propagation and for updating crack configuration,can be developed.
机译:本文描述了进行三维裂纹扩展分析的软件的开发,该软件基于具有二阶四面体单元的常规有限元方法和自动网格生成软件,六面体有限元在历史上一直用于断裂分析和计算。已经开发出了用于六面体单元的裂纹参数的计算方法。在当前的研究中,作者已经开发了用于二阶四面体有限元的VCCM(虚拟裂纹闭合积分方法)。使用四面体单元使我们能够利用自动网格生成软件。根据应力强度因子预测裂纹扩展的方向和速率,并更新裂纹的形状。因此,该软件包包含用于网格生成的模块,用于有限元分析,应力强度因子评估,用于预测裂纹扩展的速度和方向以及更新g破解配置,可以开发。

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