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arXiv 1707.02154math.NAcs.NA
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一种非线性弹性问题的混合高阶方法

A Hybrid High-Order method for nonlinear elasticity

University of Montpellier(蒙彼利埃大学);Bureau de Recherches Géologiques et Minières(地质矿产研究局)

Michele Botti, Daniele Di Pietro, Pierre Sochala

AI总结:

本文提出并分析了一种新型混合高阶离散方法,用于小变形范围内线性和非线性弹性模型的求解,支持二维和三维空间、通用网格及非匹配界面,具有任意逼近阶数,且通过静态凝聚降低计算成本,满足局部虚拟工作原理。

摘要:

在本文中,我们提出并分析了一种新型的混合高阶离散方法,用于小变形范围内的一类(线性和)非线性弹性模型。所提出的方法适用于二维和三维空间,支持通用网格,包括多面体元素和非匹配界面,允许任意逼近阶数,并且可以通过静态凝聚减少线性化问题的求解成本。此外,该方法在每个网格元素内满足局部虚拟工作原理,界面剪力遵循作用与反作用定律。对非常一般的应力-应变定律进行了完整分析,并证明了最优误差估计。还提供了对两种非线性模型的大量数值验证测试问题。

英文摘要:

In this work we propose and analyze a novel Hybrid High-Order discretization of a class of (linear and) nonlinear elasticity models in the small deformation regime which are of common use in solid mechanics. The proposed method is valid in two and three space dimensions, it supports general meshes including polyhedral elements and nonmatching interfaces, enables arbitrary approximation order, and the resolution cost can be reduced by statically condensing a large subset of the unknowns for linearized versions of the problem. Additionally, the method satisfies a local principle of virtual work inside each mesh element, with interface tractions that obey the law of action and reaction. A complete analysis covering very general stress-strain laws is carried out, and optimal error estimates are proved. Extensive numerical validation on model test problems is also provided on two types of nonlinear models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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