Novel Tubular Auxetic Metamaterial for Energy Absorption Applications

This study introduces a novel layered re-entrant tubular structure manufactured through fused deposition modeling (FDM) aimed at enhancing energy absorption capabilities in demanding engineering applications. Quasi-static compression tests were conducted to evaluate the structure's mechanical properties and energy absorption, compared with traditional auxetic design. While elastic modulus and compressive strength were comparable to conventional auxetic models, our findings demonstrate an 85% increase in specific energy absorption in the new design, attributed to enhanced deformation mode enabled by the layering technique. These results underscore the potential of advanced layering methods to significantly improve the performance of auxetic structures in various engineering applications.