Analytic Eigensystems for Isotropic Membrane Energies
Analytic Eigensystems for Isotropic Membrane Energies
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各向同性膜能量的分析本征系统
DOI:
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发表时间:
2020
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通讯作者:
Julian Panetta
中科院分区:
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作者:
Julian Panetta
We extend the approach of [Smith et al. 2019] to derive analytical expressions for the eigenvalues and eigenmatrices of an isotropic membrane energy density function $psi : mathbb{R}^{3x2} o mathbb{R}$. Clamping the eigenvalue expressions to be positive for each quadrature point of a finite element membrane simulation guarantees a positive semi-definite Hessian for the full discrete membrane energy, enabling an efficient Newton-type simulation.