Abstract

This work presents an approach to evaluate axially compressed metallic foams with the presence of holes on the structure further than foam voids. Adding holes, the total material weight is decreased but the stiffness is not linearly reduced. The stress–strain characterization is investigated and presented considering the number, size, and thickness of rectangular holes. The characterization uses representative volume elements to decompose the foam into fundamental portions. Symmetries, boundary conditions and homogenization principles are combined in a formulation in terms of parameters describing the holes, resulting in a parametric characterization. Examples are presented where the influence of holes is analyzed.

摘要

这项工作提出了一种评估轴向压缩金属泡沫的方法，其中结构上的孔比泡沫空隙更远。添加孔，材料总重量减少，但刚度并没有线性减少。考虑到矩形孔的数量、尺寸和厚度，研究并提出了应力-应变表征。表征使用代表性体积元素将泡沫分解成基本部分。对称性、边界条件和均匀化原则在描述孔的参数方面结合在一个公式中，从而产生参数化表征。给出了分析孔影响的示例。