arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0901.4745math.NAcs.NAmath.SP
收藏

一维准连续近似的最优阶误差分析

An Optimal Order Error Analysis of the One-Dimensional Quasicontinuum Approximation

University of Minnesota(明尼苏达大学)

Matthew Dobson, Mitchell Luskin

AI总结:

针对能量基准连续近似和准非局域准连续近似,推导了一个模型问题,在连续极限下实现了最优阶收敛速度的分析,并给出了准非局域准连续近似在断裂连续极限应变以下所有应变的最优阶误差估计。

摘要:

我们推导了一个用于准连续近似的模型问题,该问题允许对能量基准连续近似和准非局域准连续近似在连续极限下的最优阶收敛速度进行简单而深入的分析。给出了准非局域准连续近似在断裂连续极限应变以下所有应变的最优阶误差估计。该分析基于对原子到连续界面耦合误差的显式处理,并结合使用准连续近似的稳定性对原子和连续格式误差的分析。

英文摘要:

We derive a model problem for quasicontinuum approximations that allows a simple, yet insightful, analysis of the optimal-order convergence rate in the continuum limit for both the energy-based quasicontinuum approximation and the quasi-nonlocal quasicontinuum approximation. The optimal-order error estimates for the quasi-nonlocal quasicontinuum approximation are given for all strains up to the continuum limit strain for fracture. The analysis is based on an explicit treatment of the coupling error at the atomistic to continuum interface, combined with an analysis of the error due to atomistic and continuum schemes using the stability of the quasicontinuum approximation.

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。

↑