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Abstract <p>The mechanical properties of metamaterials with a cellular chiral internal structure were experimentally studied during normal penetration by a rigid spherical striker. The metamaterial samples were 3D printed from TPU 95A plastic (thermoplastic polyurethane). They had auxetic and non-auxetic chiral structures of cells in the form of concave and convex hexagons, respectively. The results of the experiments on sample penetration, conducted for two temperature and two speed modes, are presented. The relative loss of kinetic energy of the striker during penetration of auxetic samples was significantly higher than that of non-auxetic ones. It was found that for the studied types of flexible metamaterials, the resistance to striker penetration increases with increasing temperature in the considered temperature range. The dependence of the striker deviation on exit from the flexible sample on the type of chirality of the structure being penetrated was established.</p>

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Temperature Influence of Metamaterials Based on Flexible TPU 95A Plastic on Resistance to Penetration by a Rigid Striker

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • S. Yu. Ivanova,
  • K. Yu. Osipenko,
  • N. V. Banichuk,
  • D. S. Lisovenko

摘要

Abstract

The mechanical properties of metamaterials with a cellular chiral internal structure were experimentally studied during normal penetration by a rigid spherical striker. The metamaterial samples were 3D printed from TPU 95A plastic (thermoplastic polyurethane). They had auxetic and non-auxetic chiral structures of cells in the form of concave and convex hexagons, respectively. The results of the experiments on sample penetration, conducted for two temperature and two speed modes, are presented. The relative loss of kinetic energy of the striker during penetration of auxetic samples was significantly higher than that of non-auxetic ones. It was found that for the studied types of flexible metamaterials, the resistance to striker penetration increases with increasing temperature in the considered temperature range. The dependence of the striker deviation on exit from the flexible sample on the type of chirality of the structure being penetrated was established.