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<p>Unlike conventional planar or foam-inspired lattice midsoles, this work introduces one of the first elastomeric cylindrical chiral metamaterial architectures fabricated via high-resolution DLP, enabling an unprecedented level of geometric programmability and mechanical tunability. A parametric design space was explored by varying ligament thickness (0.25-0.85&#xa0;mm) and cylinder width (1.5-5.5&#xa0;mm), and the resulting structures were evaluated through both finite element analysis and compression testing, achieving excellent agreement with an average deviation below 3%. The CCMS demonstrated an exceptionally broad performance range, with specific stiffness tunable from 0.24 to 0.84&#xa0;N/mm&#xa0;g (a ~ 350% increase) and specific energy absorption from 13.8 to 353.5&#xa0;mJ/g (a 2561% tunability), exceeding the capabilities of conventional lattice and auxetic architectures commonly used in footwear. The auxetic response, adjustable from −1.7 to −3.5, further enhanced lateral expansion and stress redistribution, while thinner geometries provided superior stress dispersion across the chiral network. A conceptual integration into a sport shoe midsole highlights the practical potential of CCMS to deliver lightweight, customizable cushioning with improved impact mitigation and stability. These findings establish CCMS as a highly programmable metamaterial platform with strong promise for next-generation performance footwear and other applications requiring efficient, geometrically tunable mechanical response.</p>

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Elastic Chiral Metamaterials for High-Performance Sport Shoes Fabricated via Additive Manufacturing

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • Jiayi Wang

摘要

Unlike conventional planar or foam-inspired lattice midsoles, this work introduces one of the first elastomeric cylindrical chiral metamaterial architectures fabricated via high-resolution DLP, enabling an unprecedented level of geometric programmability and mechanical tunability. A parametric design space was explored by varying ligament thickness (0.25-0.85 mm) and cylinder width (1.5-5.5 mm), and the resulting structures were evaluated through both finite element analysis and compression testing, achieving excellent agreement with an average deviation below 3%. The CCMS demonstrated an exceptionally broad performance range, with specific stiffness tunable from 0.24 to 0.84 N/mm g (a ~ 350% increase) and specific energy absorption from 13.8 to 353.5 mJ/g (a 2561% tunability), exceeding the capabilities of conventional lattice and auxetic architectures commonly used in footwear. The auxetic response, adjustable from −1.7 to −3.5, further enhanced lateral expansion and stress redistribution, while thinner geometries provided superior stress dispersion across the chiral network. A conceptual integration into a sport shoe midsole highlights the practical potential of CCMS to deliver lightweight, customizable cushioning with improved impact mitigation and stability. These findings establish CCMS as a highly programmable metamaterial platform with strong promise for next-generation performance footwear and other applications requiring efficient, geometrically tunable mechanical response.