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Cut finite element modeling of linear membranes

机译:线性膜的切割有限元建模

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We construct a cut finite element method for the membrane elasticity problem on an embedded mesh using tangential differential calculus, i.e., with the equilibrium equations pointwise projected onto the tangent plane of the surface to create a pointwise planar problem in the tangential direction. Both free membranes and membranes coupled to 3D elasticity are considered. The discretization of the membrane comes from a Galerkin method using the restriction of 3D basis functions (linear or trilinear) to the surface representing the membrane. In the case of coupling to 3D elasticity, we view the membrane as giving additional stiffness contributions to the standard stiffness matrix resulting from the discretization of the three-dimensional continuum. (C) 2016 Elsevier B.V. All rights reserved.
机译:我们使用切向微分法(即将平衡方程式点向投影到表面的切平面上以在切向方向上创建点向平面问题)构造嵌入式网格上膜弹性问题的割有限元方法。自由膜和耦合到3D弹性的膜都被考虑了。膜的离散化来自Galerkin方法,该方法使用3D基本函数(线性或三线性)限制到代表膜的表面。在耦合到3D弹性的情况下,我们认为该膜为三维连续体离散化后的标准刚度矩阵提供了额外的刚度贡献。 (C)2016 Elsevier B.V.保留所有权利。

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