Abstract
ABSTRACT This study investigates the high-impact behaviour of auxetic materials, recognised for their negative Poisson’s ratio and exceptional energy absorption, when combined with shape memory alloys to enhance impact resistance. Using finite element analysis in Abaqus, 42 unique auxetic models were developed with variations in angles, thicknesses, heights, and lengths to examine structural response under high-velocity impacts. The findings reveal that modifications to the height-to-length ratio, thickness-to-length ratio, and cell design angle significantly affect residual projectile velocity – reducing it by up to 17%, fully eliminating it in some cases, or increasing it by 34% depending on the configuration. These adjustments also influence energy absorption rates and specific energy absorption during collision events. Poisson’s ratios, derived through both analytical and numerical methods, showed strong agreement, validating the accuracy of the models. Overall, the study ident ifies optimal design configurations that maximise energy absorption and minimise projectile velocity upon impact. These findings have practical implications for industries requiring durable materials in high-impact applications, and the integration of auxetic structures with shape memory alloys suggests promising directions for innovative material design.
Published Version
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