Dynamic failure characteristics of metallic sandwich plate with repeated metallic truss cores subjected to a plane strain drop impact condition

Abstract

Dynamic failure characteristics of a metallic sandwich plate with repeated metallic cores considerably affect the dynamic property and the functionality of the plate. The objective of this paper is to examine dynamic failure characteristics of a metallic sandwich plate with repeated metallic truss cores subjected to plane strain drop impact conditions via a three-dimensional finite element analysis. Dynamic failure modes of the metallic sandwich plate have been estimated using the residual deformed shape of the plate. Nondimensional impact parameters have been adopted to generalize the dynamic failure map (DFM). Limit curves for different dynamic failure modes have been estimated via a regression analysis using the limit impact conditions in dynamic failure plots (DFPs). DFMs of the metallic sandwich plate have been created using the limit curves and the DFPs. The effects of the non-dimensional impact parameters on dynamic failure characteristics of the metallic sandwich plate have been discussed. The relationship between nondimensional impact energy and non-dimensional absorbed energy has been estimated to investigate the energy absorption characteristics of the plate. Finally, it has been revealed that the initiation of the instability mode is prevented to obtain the desired performance of the metallic sandwich plate with repeated metallic truss cores.