Energy absorption characteristics of additively manufactured plate-lattices under low- velocity impact loading

Abstract This study is focused on the low-velocity impact response of 3D plate-lattices fabricated via stereolithography additive manufacturing (AM). Elementary (SC, BCC and FCC) hybrid (SC-BCC, SC-FCC SC-BCC-FCC) configurations were tested effects energy, relative density, plate-thickness, multiple impacts angle dynamic crushing behavior energy absorption characteristics analyzed. The experimental results reveal that lattices, due to existence larger number open closed sub-cells, able attenuate peak stress transmitted structure extend duration load pulse (high toughness). A significant dependency contact force-displacement structures was noticed with increase in energy. SC-BCC-FCC depicted a 70% toughness their specific capacity higher than conventional aluminum lattices other practical metamaterials. Experimental observations also revealed distribution plates each elementary configuration plays an important role mitigating deleterious failure mode by transforming brittle fracture into progressive damage plate-lattices. paper, believed be first comprehensive study, discusses impacts, oblique low velocity geometrically hybridized plate-lattice structures. this investigation suggest concept hybridization architectures conjunction AM will enable development lightweight high absorbing for wide variety applications.