Multi-Scale Modeling for Predicting the Stiffness and Strength of Hollow-Structured Metal Foams with Structural Hierarchy

摘要: This work was inspired by previous experiments which managed to establish an optimal template-dealloying route prepare ultralow density metal foams. In this study, we propose a new analytical-numerical model of hollow-structured foams with structural hierarchy predict its stiffness and strength. The two-level comprises main backbone secondary nanoporous structure. is composed hollow sphere-packing architecture, while the one constructed bicontinuous network proposed describe nanoscale interactions in shell. Firstly, two models different geometries are generated Voronoi tessellation, then scaling laws mechanical properties determined as function relative finite volume simulation. Furthermore, applied identify uniaxial compression behavior It shown that thickness highly influence Young's modulus yield strength, vacancy defect determines being self-supported. present study provides not only insights into behaviors both metals foams, but also practical guide for their fabrication application.