Numerical investigations on the mechanical properties of metallic hollow spheres structure with perforations under compression

Abstract

This paper numerically investigates the compressive mechanical properties of the perforated hollow spheres structures with different geometrical and physical properties. In these structures, the metallic hollow spheres are perforated regularly with several holes, which open the inner sphere volume and surface and are bonded in simple cubic, body-centered cubic and face-centred cubic patterns. The 5 × 5 cells finite element models under uniaxial compression are established by ABAQUS 6.14 software for simulation. The influence of the spheres' spatial pattern, as well as base materials for the spheres and bonding necks on the structural mechanical properties are evaluated. By changing the wall thickness, hole diameter and bonding radius in the body-centered cubic packing finite element model, the elastic modulus, Poisson's ratio and initial yield stress are calculated and discussed as functions of these geometrical parameters and their average densities.Keywords: Cellular material / metallic hollow spheres structure / mechanical properties / geometric effect / finite element method Schlüsselwörter: Zellmaterial / Struktur der Metallhohlkugeln / mechanische Eigenschaften / geometrische Wirkung / Finite-Elemente-Methode Numerical investigations on metallic hollow spheres structure Materialwiss. Werkstofftech. 2020, 51, 488-499