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<p>This comprehensive study investigates the innovative design and thorough characterization of thermoplastic polyurethane (TPU)-based ‘Labyrinth’ metamaterials specifically engineered to meet the demanding requirements of contemporary architectural applications. By leveraging state-of-the-art 3D modeling and advanced printing technologies, the research systematically optimizes critical geometric and material parameters to substantially enhance key mechanical properties, including exceptional flexibility, controlled compressibility, and superior shock absorption capabilities. Rigorous experimental testing protocols, encompassing tensile strength analysis, compression resistance evaluation, precise density measurements, and comprehensive acoustic performance assessment, conclusively demonstrate that the optimized 40% filled metamaterial configuration achieves markedly superior performance characteristics compared to conventional raw TPU, with particularly noteworthy improvements in auxetic behavior (exhibiting a negative Poisson’s ratio of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:-\)</EquationSource> </InlineEquation>0.35) and remarkable sound attenuation performance (achieving a 20.6 dBA reduction relative to 16.9 dBA for raw material). The quantified results provide compelling evidence that these intelligently designed metamaterials significantly outperform conventional building materials, delivering enhanced force management, superior acoustic insulation properties, and substantial weight reduction benefits through lower material density (1.12 g<InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:/\)</EquationSource> </InlineEquation>cm<sup>3</sup>). These significant findings firmly establish TPU-based metamaterials as transformative and highly promising innovative solutions for modern architecture, demonstrating substantial potential for meaningfully improving occupant comfort, safety, and comprehensive structural protection in contemporary building applications while paving the way for future architectural innovations.</p>

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TPU-based labyrinth metamaterials for architectural applications: integrated optimization of mechanical properties and acoustic performance through additive manufacturing

  • 期刊论文

  • 发表日期：

    2026年3月5日

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  • Abdelaziz Faci,
  • Zinelabiddine Mezache,
  • Mohammed Berka,
  • Zakarya Hafdi,
  • Abdullah Mossa Y Alzahrani,
  • Enas Ali,
  • Sherif S. M. Ghoneim,
  • Abdallah Alshennawy

摘要

This comprehensive study investigates the innovative design and thorough characterization of thermoplastic polyurethane (TPU)-based ‘Labyrinth’ metamaterials specifically engineered to meet the demanding requirements of contemporary architectural applications. By leveraging state-of-the-art 3D modeling and advanced printing technologies, the research systematically optimizes critical geometric and material parameters to substantially enhance key mechanical properties, including exceptional flexibility, controlled compressibility, and superior shock absorption capabilities. Rigorous experimental testing protocols, encompassing tensile strength analysis, compression resistance evaluation, precise density measurements, and comprehensive acoustic performance assessment, conclusively demonstrate that the optimized 40% filled metamaterial configuration achieves markedly superior performance characteristics compared to conventional raw TPU, with particularly noteworthy improvements in auxetic behavior (exhibiting a negative Poisson’s ratio of \(\:-\) 0.35) and remarkable sound attenuation performance (achieving a 20.6 dBA reduction relative to 16.9 dBA for raw material). The quantified results provide compelling evidence that these intelligently designed metamaterials significantly outperform conventional building materials, delivering enhanced force management, superior acoustic insulation properties, and substantial weight reduction benefits through lower material density (1.12 g \(\:/\) cm3). These significant findings firmly establish TPU-based metamaterials as transformative and highly promising innovative solutions for modern architecture, demonstrating substantial potential for meaningfully improving occupant comfort, safety, and comprehensive structural protection in contemporary building applications while paving the way for future architectural innovations.