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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >A global-local discontinuous Galerkin shell finite element for small-deformation analysis of multi-layered composites
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A global-local discontinuous Galerkin shell finite element for small-deformation analysis of multi-layered composites

机译：用于多层复合材料小变形分析的全局局部不连续Galerkin壳有限元

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This paper focuses on the development of a global-local doubly-curved shell element, suitable for small-deformation implicit and/or explicit dynamic analysis of laminated composite structures. The global-local framework is based on the superposition of a global displacement field, spanning the thickness of the entire laminate, and local (layerwise) displacement fields associated with each layer of the laminate. This approach affords highly-resolved representations in regions of critical interest, and allows a smooth transition from higher to lower resolution zones. Continuity between adjacent layers is enforced by means of discontinuous Galerkin fluxes. Parasitic phenomena characteristic of bilinear shell elements, such as shear locking, are alleviated with the aid of assumed natural strain techniques. Performance characteristics of the proposed finite element are examined with the aid of several numerical examples involving static and dynamic analysis of thick as well as thin shells.
机译：本文着重于开发全局局部双曲线壳单元，该单元适用于层压复合结构的小变形隐式和/或显式动力分析。全局局部框架基于覆盖整个层压板厚度的全局位移场和与层压板每一层相关的局部（逐层）位移场的叠加。这种方法可在关键关注区域提供高度解析的表示，并允许从高分辨率区域到低分辨率区域的平滑过渡。相邻层之间的连续性是通过不连续的Galerkin通量来实现的。借助假定的自然应变技术，可以缓解双线性壳单元特征性的寄生现象，例如剪切锁定。通过几个数值示例，包括厚壳和薄壳的静态和动态分析，研究了所提出的有限元的性能特征。

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