Energy absorption enhancement of additively manufactured hexagonal and re-entrant (auxetic) lattice structures by using multi-material reinforcements

The effect of using multiple materials within hexagonal and re-entrant (auxetic) cellular structures was investigated. For each topology, three different material configurations including (a) Nylon, (b) Carbon fibre reinforced Nylon (c) Glass were used. A numerical model constituted to imitate the compressive behaviour these multi-material under quasi-static loading. validation, samples printed with Fused Filament Fabrication (FFF) technique experimentally tested. good correlation captured between experimental analyses. This study found that deploying a approach enhanced specific energy absorption, strength modulus values over single structure 60 %, 104 % 201 respectively. similar trend lesser improvements 15 127 monitored for structure, in same sequence. • compression behavior 3D absorption characteristics could be improved by replacing fibres walls. on deformation pattern investigated sequentially. established further develop concepts results systematically compared results.