Fast MATLAB evaluation of nonlinear energies using FEM in 2D and 3D: nodal elements
Fast MATLAB evaluation of nonlinear energies using FEM in 2D and 3D: nodal elements
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使用 2D 和 3D 中的 FEM 快速 MATLAB 评估非线性能量:节点元素
DOI:
10.1016/j.amc.2022.127048
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发表时间:
2021
期刊:
影响因子:
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通讯作者:
J. Valdman
中科院分区:
文献类型:
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作者:
Alexej Moskovka;J. Valdman
Nonlinear energy functionals appearing in the calculus of variations can be discretized by the finite element (FE) method and formulated as a sum of energy contributions from local elements. A fast evaluation of energy functionals containing the first order gradient terms is a central part of this contribution. We describe a vectorized implementation using the simplest linear nodal (P1) elements in which all energy contributions are evaluated all at once without the loop over triangular or tetrahedral elements. Furthermore, in connection to the first-order optimization methods, the discrete gradient of energy functional is assembled in a way that the gradient components are evaluated over all degrees of freedom all at once. The key ingredient is the vectorization of exact or approximate energy gradients over nodal patches. It leads to a time-efficient implementation at higher memory-cost. Provided codes in MATLAB related to 2D/3D hyperelasticity and 2D p-Laplacian problem are available for download and structured in a way it can be easily extended to other types of vector or scalar forms of energies.
DOI:
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发表时间:
2007
期刊:
影响因子:
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作者:
H.;Maruyama
通讯作者:
Maruyama