泡沫铝弹性接触静力学行为的多尺度模拟

On multiscale simulation for static elastical surface contact behavior of foamed aluminum

对泡沫铝的宏、细观组织结构,基于MC方法建立与材料制备工艺相应的数值模型,作为多尺度模拟的前提。通过计算模拟和统计分析大量数值试样的力学性能,得到了不同制备工艺制得的泡沫铝的弹性模量的分散性特点。借鉴代表性体积单元方法(RVE)和完全多格方法(FMG)的思想,采用基于"巨原子"模型的多尺度关联方法,并以简化的物理势场描述巨原子间的关系,设计了原子—巨原子—有限元多尺度算法。通过算例探讨了与理想刚性平面接触时,泡沫铝接触表面的应力集中情况。

The microstructure of a foamed material was numerically modeled corresponding to its different preparation processes based on MC method.Multi-scale simulation calculations should be based on these accurate numerical models of material histology.Based on the thoughts of RVE and FMG methods,huge-atom multiscale connecting method was used with predigested physics potential describing the interactions among huge-atoms to develop a multi-scale simulation method of atom-huge-atom-FE.An example of multi-scale numerical calculation of pure elastic contact problem of the foamed aluminum was carried out.