Parameters analysis of cylindrical structures with negative poisson's ratio under compression

The negative Poisson's ratio cylindrical structure, as a novel metamaterial, presents significant application potential, particularly in aerospace and civil engineering. This study designs and fabricates a new negative Poisson's ratio cylindrical structure, systematically investigating the effects of internal concave angle and wall thickness on the compressive performance and negative Poisson's ratio effect through experimental research and finite element analysis. The results indicate that decreasing the internal concave angle significantly enhances the structure's load-bearing capacity and energy absorption efficiency per unit mass. While increasing wall thickness improves total energy absorption, its effect on energy absorption per unit mass is relatively limited. Furthermore, the reduction in internal concave angle and the increase in wall thickness enhance compressive strength but diminish the negative Poisson's ratio effect. This research provides essential theoretical insights for the optimization of negative Poisson's ratio cylindrical structures in engineering applications.