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arXiv 2401.02170math.NAcs.NA
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拟静态接触问题的非协调 FEM

Non-conforming FEM for the quasi-static contact problem

Kamana Porwal, Tanvi Wadhawan

AI总结:

本文研究拟静态接触问题对应的非线性演化变分不等式,采用后向 Euler 与最低阶 Crouzeix-Raviart 非协调有限元进行半离散和全离散,建立先验误差分析并实现线性元最优收敛阶,以二维数值算例验证收敛率。

摘要:

在本文中,我们处理了非线性演化变分不等式的数值求解,该不等式在拟静态接触问题的研究中遇到。我们的研究涵盖半离散和全离散格式,其中时间离散采用后向 Euler 方法,空间离散采用最低阶 Crouzeix-Raviart 非协调有限元方法。通过对解假设适当的正则性条件,我们为这些格式建立了先验误差分析,实现了线性元的最优收敛阶。为说明数值收敛率,我们在二维测试问题上给出了数值结果。

英文摘要:

In this article, we addressed the numerical solution of a non-linear evolutionary variational inequality, which is encountered in the investigation of quasi-static contact problems. Our study encompasses both the semi-discrete and fully-discrete schemes, where we employ the backward Euler method for time discretization and utilize the lowest order Crouzeix-Raviart nonconforming finite element method for spatial discretization. By assuming appropriate regularity conditions on the solution, we establish \emph{a priori} error analysis for these schemes, achieving the optimal convergence order for linear elements. To illustrate the numerical convergence rates, we provide numerical results on a two-dimensional test problem.

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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