Scholarlink

<p>A composite of a woven fabric embedded in a soft matrix exhibits the attributes of both constituents. The fabric is strong in tension but flexible in bending. The soft matrix impedes fluid penetration. Applications of such composites include tents, rain coats, and wound closure patches. How such a composite tears under cyclic load remains unclear. Here we embed a woven fabric of ultrahigh molecular weight polyethylene in a soft matrix of thermoplastic polyurethane, and tear each specimen of the composite with cyclic energy release rate of a fixed amplitude, <i>G</i>. Two thresholds are identified, <i>G</i><sub><i>a</i></sub> and <i>G</i><sub><i>b</i></sub>. When <i>G</i> &lt; <i>G</i><sub><i>a</i></sub>, the composite does not tear. When <i>G</i><sub><i>a</i></sub> &lt; <i>G</i> &lt; <i>G</i><sub><i>b</i></sub>, the composite tears by yarn slip without yarn break, and then tearing arrests after yarns jam. When <i>G</i><sub><i>b</i></sub> &lt; <i>G</i>, the composite tears, without arrest, by a combination of yarn slip and yarn break. We then prepare a composite with strengthened fabric-matrix interface, and find that <i>G</i><sub><i>a</i></sub> increases but <i>G</i><sub><i>b</i></sub> decreases. We interpret these findings in terms of stress deconcentration along the yarns. It is hoped that this study will aid the development of fatigue-resistant composites.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Cyclic tearing of a woven fabric embedded in a soft matrix

  • 期刊论文

  • 发表日期：

    2025年1月8日

查看全文
  • Jingyuan Tang,
  • Fengkai Liu,
  • Xi Chen,
  • Zhigang Suo,
  • Jingda Tang

摘要

A composite of a woven fabric embedded in a soft matrix exhibits the attributes of both constituents. The fabric is strong in tension but flexible in bending. The soft matrix impedes fluid penetration. Applications of such composites include tents, rain coats, and wound closure patches. How such a composite tears under cyclic load remains unclear. Here we embed a woven fabric of ultrahigh molecular weight polyethylene in a soft matrix of thermoplastic polyurethane, and tear each specimen of the composite with cyclic energy release rate of a fixed amplitude, G. Two thresholds are identified, Ga and Gb. When G < Ga, the composite does not tear. When Ga < G < Gb, the composite tears by yarn slip without yarn break, and then tearing arrests after yarns jam. When Gb < G, the composite tears, without arrest, by a combination of yarn slip and yarn break. We then prepare a composite with strengthened fabric-matrix interface, and find that Ga increases but Gb decreases. We interpret these findings in terms of stress deconcentration along the yarns. It is hoped that this study will aid the development of fatigue-resistant composites.