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<p>Due to its excellent energy absorption capacity, auxetic materials have become a research focus in the fields of military, textile and construction, etc. At present, the research on the tensile properties of auxetic fabrics woven from helical auxetic yarns (HAYs) is rare. Auxetic fabrics were prepared based on the negative Poisson's ratio effect of HAYs. The negative Poisson ratio and tensile properties of fabrics were tested, and the deformation behavior and damage mechanism were studied by Digital speckle correlation method (DSCM) The results show that the tensile strength of the auxetic fabric with plain weave and mesh size of 5 mm × 15 mm is the highest, the strength efficiency is increased by up to 26.69%, and the maximum negative Poisson's ratio is − 0.41. The displacement and strain distribution of the auxetic fabric with a mesh size of 5&#xa0;mm × 15&#xa0;mm is more uniform. The elastic modulus and fracture absorption energy of auxetic fabric in the process of tensile damage are related to the change of its negative Poisson's ratio. In the “auxiliary” fiber strengthening stage, the negative Poisson's ratio of the auxetic fabric reaches the maximum value, with the increase in the elastic modulus and the fracture absorption energy.</p>

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Tensile Properties and Damage Mechanism of Carbon Fiber-PVA Fiber Auxetic Fabrics

  • 期刊论文

  • 发表日期：

    2025年11月23日

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  • Yanxuan Ma,
  • Peng Wang,
  • Zhipeng Zhang,
  • Qin Chang,
  • Jin Liu,
  • Ruyi Zhang,
  • Siyuan Wang,
  • Dongying Xu

摘要

Due to its excellent energy absorption capacity, auxetic materials have become a research focus in the fields of military, textile and construction, etc. At present, the research on the tensile properties of auxetic fabrics woven from helical auxetic yarns (HAYs) is rare. Auxetic fabrics were prepared based on the negative Poisson's ratio effect of HAYs. The negative Poisson ratio and tensile properties of fabrics were tested, and the deformation behavior and damage mechanism were studied by Digital speckle correlation method (DSCM) The results show that the tensile strength of the auxetic fabric with plain weave and mesh size of 5 mm × 15 mm is the highest, the strength efficiency is increased by up to 26.69%, and the maximum negative Poisson's ratio is − 0.41. The displacement and strain distribution of the auxetic fabric with a mesh size of 5 mm × 15 mm is more uniform. The elastic modulus and fracture absorption energy of auxetic fabric in the process of tensile damage are related to the change of its negative Poisson's ratio. In the “auxiliary” fiber strengthening stage, the negative Poisson's ratio of the auxetic fabric reaches the maximum value, with the increase in the elastic modulus and the fracture absorption energy.