Abstract In this paper, we propose an efficient 3-node shell element with 6 DOFs per node based on Naghdi-Reissner-Mindlin theory. This new composite shell element, further denoted as DKMT18, takes into account shear deformation and coupled bending-membrane energy. DKMT18 element passes membrane, bending, and shear patch tests with no spurious mode. It also performs successfully in standard tests for thick and thin shells problems without membrane or shear locking. The proposed shell element is capable of dealing with composite laminated shell structures. The computed results by the DKMT18 element converge more rapidly towards the reference solution compared to any state of-the-art shell element.

中文翻译：

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考虑剪切变形的复合材料新三角壳单元

摘要 在本文中，我们基于 Naghdi-Reissner-Mindlin 理论提出了一种高效的 3 节点壳单元，每个节点具有 6 个自由度。这种新的复合壳单元，进一步表示为 DKMT18，考虑了剪切变形和耦合弯曲膜能量。DKMT18 元件通过了膜、弯曲和剪切贴片测试，无杂散模式。它还在没有膜或剪切锁定的厚壳和薄壳问题的标准测试中成功执行。所提出的壳单元能够处理复合层压壳结构。与任何最先进的壳单元相比，DKMT18 单元的计算结果向参考解决方案收敛得更快。