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arXiv 1102.2523math.NAcond-mat.mtrl-scics.NA
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三维原子与连续模型力基混合方法的收敛性

Convergence of a force-based hybrid method for atomistic and continuum models in three dimension

New York University(纽约大学)

Jianfeng Lu, Pingbing Ming

AI总结:

研究力基混合方法耦合原子模型与非线性Cauchy-Born弹性模型,证明当晶格参数与变形特征尺度之比趋于零时,该方法二次收敛到原子模型解,适用于三维简单晶格和一般短程原子势。

摘要:

我们研究了一种力基混合方法,该方法将原子模型与非线性Cauchy-Born弹性模型耦合。我们证明,当晶格参数与变形特征尺度之比趋于零时,所提出的方案二次收敛到原子模型解。收敛性针对一般短程原子势和三维简单晶格建立。收敛性基于一致性和稳定性分析。在伪差分算子的框架下,发展了用于任意维数多尺度原子与连续耦合方法稳定性分析的一般工具。

英文摘要:

We study a force-based hybrid method that couples atomistic models with nonlinear Cauchy-Born elasticity models. We show that the proposed scheme converges quadratically to the solution of the atomistic model, as the ratio between lattice parameter and the characteristic length scale of the deformation tends to zero. Convergence is established for general short-ranged atomistic potential and for simple lattices in three dimension. The convergence is based on consistency and stability analysis. General tools are developed in the framework of pseudo-difference operators for stability analysis in arbitrary dimension of the multiscale atomistic and continuum coupling methods.

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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