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A new multiscale methodology for modeling of single and multi-body solid structures

机译：用于单实体和多实体实体结构建模的新的多尺度方法

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摘要

Fixed Interfacial Multiscale Method (FIMM), a concurrent multiscale model is developed for mechanical analysis of solid nanostructures at the finite temperatures. A direct link between the nano field atoms and macro field nodes using the local atomic volume displacements associated with every macro field node in their common zone has been replaced with the previous methods. FIMM leaves negligible relative motion of atoms in every atomic volume by moving the interface into the macro part. A nano plate in extension and a nanorobotic manipulator have been simulated for comparison. The responses have been compared with the results of semi continuum approach, Molecular Dynamics (MDs), a developed simple Coarse Grained MD (CGMD) and two recently developed multiscale methods. Comparisons show that FIMM is at least 450% better than other methods in numerical cost, and it is also more accurate than other multiscale methods.
机译：固定界面多尺度方法（FIMM）是一种并发多尺度模型，用于在有限温度下对固体纳米结构进行机械分析。纳米场原子和宏场节点之间的直接链接使用与它们共同区域中每个宏场节点相关联的局部原子体积位移替换为先前的方法。 FIMM通过将界面移到宏部分中，使每个原子体积中的原子相对运动都可以忽略不计。为了进行比较，模拟了延伸的纳米板和纳米机械手。已将响应与半连续方法，分子动力学（MD），已开发的简单粗粒度MD（CGMD）和最近开发的两种多尺度方法的结果进行了比较。比较表明，FIMM的数值成本至少比其他方法好450％，并且比其他多尺度方法更准确。

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