Abstract In this study, a novel scheme for modelling and analysis of spot-welded shell structures is presented by placing local spider-web shell meshes representing the weld nugget region in a global shell mesh. Interface shell elements are employed for trimmed shell elements with arbitrary number of nodes created by cutting a global shell mesh with the boundaries of local spider-web shell meshes. Transverse shear and membrane locking phenomena in interface shell elements are effectively alleviated by introducing assumed natural strain fields. Conventional elastic beam elements with six degrees of freedom are used to connect the center nodes of local spider-web shell meshes. The present method can construct high-quality shell meshes around spot welds without any global remeshing, which makes it very efficient and effective for the analysis of spot-welded shell structures.

中文翻译：

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一种使用界面壳单元对点焊壳结构进行建模和分析的新方案

摘要 在这项研究中，通过在全局壳网格中放置代表焊缝熔核区域的局部蜘蛛网壳网格，提出了一种新的点焊壳结构建模和分析方案。界面壳单元用于通过切割具有局部蜘蛛网壳网格边界的全局壳网格创建的具有任意数量节点的修剪壳单元。通过引入假定的自然应变场，可以有效缓解界面壳单元中的横向剪切和膜锁定现象。使用具有六个自由度的常规弹性梁单元连接局部蜘蛛网壳网格的中心节点。本方法可以在焊点周围构建高质量的壳网格，无需任何全局重新网格划分，