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arXiv 2006.15073math.AP
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从Peierls-Nabarro模型到位错连续体运动方程

From the Peierls-Nabarro model to the equation of motion of the dislocation continuum

Stefania Patrizi, Tharathep Sangsawang

摘要:

考虑一维半线性积分微分方程,该方程对应于半拉普拉斯算子。其溶液代表晶体中的原子位错。该方程包含经典Peierls-Nabarro模型的演化版本。我们表明,对于大量的位错,解决方案,适当重新缩放,收敛到一个众所周知的方程的解决方案,称为头\cite{H}“的位错连续体的运动方程”。极限方程是考虑位错密度的宏观晶体塑性模型。特别是,我们恢复了所谓的奥罗万定律,该定律指出位错以与有效应力成比例的速度移动。

英文摘要:

We consider a semi-linear integro-differential equation in dimension one associated to the half Laplacian %This model describes the evolution of phase transitions associated to dislocations. whose solution represents the atom dislocation in a crystal. The equation comprises the evolutive version of the classical Peierls-Nabarro model. We show that for a large number of dislocations, the solution, properly rescaled, converges to the solution of a well known equation called by Head \cite{H} "the equation of motion of the dislocation continuum". The limit equation is a model for the macroscopic crystal plasticity with density of dislocations. In particular, we recover the so called Orowan's law which states that dislocations move at a velocity proportional to the effective stress.

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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