INFLUENCE OF STRAIN RATE ON THE ASHBY-GIBSON PARAMETERS OF SHEET DIAMOND LATTICE STRUCTURES

Abstract

Triply periodic minimal surface structures (TPMSs) can be used as a substitute for polymeric foams in applications where is necessary to absorb a large amount of energy with high structural deformation. Diamond TPMS offers higher energy absorption per unit weight. This structure is based on the Ashby-Gibson material model that establishes the main mechanical material properties as functions of the relative density and material properties. However, since TPMSs are used in dynamic applications, it is essential to analyse them under dynamic loads. In this study, we investigate the influence of the strain rate on the Ashby-Gibson parameters of sheet diamond Keywords: Triple periodic minimal surface; strain rate; additive manufacturing; diamond; Ashby-Gibson