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首页> 外文期刊>International Journal of Offshore and Polar Engineering >Analysis of Three-dimensional Surface Cracks in a Welded Joint Structure Using the Shell-Solid Mixed Method
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Analysis of Three-dimensional Surface Cracks in a Welded Joint Structure Using the Shell-Solid Mixed Method

机译：壳固混合法分析焊接接头结构中的三维表面裂纹

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摘要

We present a new approach to calculate stress intensity factors of three-dimensional surface cracks in welded joints of a ship structure. We analyze problems involving very different length scales, using a shell-solid mixed finite element model. In this technique, the shell element model is used on the whole ship structure, and the solid element model is adopted for the part of the welded joint with a three-dimensional surface crack. The solid model is constituted of the quadrilateral tetrahedral elements. The shell model and the solid model are connected using the semi-auto RBE3 connecting technique, which enhances the tractability of the shell-solid mixed modeling. The Virtual Crack Closure-Integral Method for the tetrahedral finite element method is used to calculate the SIFs of the surface crack. In this paper, the numerical approach and the application are demonstrated.
机译：我们提出了一种新的方法来计算船舶结构焊接接头中三维表面裂纹的应力强度因子。我们使用壳固混合有限元模型分析涉及非常不同的长度尺度的问题。在这种技术中，在整个船体结构上使用壳单元模型，对于具有三维表面裂纹的焊接接头部分采用实体单元模型。实体模型由四边形四面体元素构成。壳模型和实体模型使用半自动RBE3连接技术进行连接，从而增强了壳-固体混合建模的易处理性。四面体有限元方法的虚拟裂纹闭合积分方法用于计算表面裂纹的SIF。本文阐述了数值方法及其应用。

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