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Development of spiral auxetic structures

机译：螺旋膨胀结构的发展

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摘要

An auxetic tow or fiber bundle that will expand in diameter when extended axially would be very useful. It could be woven into a shape-changing cloth, perhaps used for ballistic protection, or as an easily cleaned filter. To explore this concept, spiral fiber bundle structures under tension were explored. Theory describing the geometry of spiral structures was developed. Several types of finite element models for these spiral structures using laminated plate elements, beam elements and solid elements with contact were then developed and compared at a range of angles. The beam and solid element models provide the best approximation and indicate that a 30 degrees/45 degrees fiber structure is a good angle combination to not only provide significant radial expansion but also show a relatively low stress. Several polymeric specimens were 3D-printed and tested under tension. Testing confirmed that the spiral fiber systems exhibited auxetic behavior. The polymeric specimens exhibited more radial expansion than the finite element predictions. Thus, spiral fiber bundles show promise and will be explored further.
机译：当轴向延伸时直径会膨胀的膨胀丝束或纤维束将非常有用。可以将其编织成可变形的布，也许用于防弹保护或用作易于清洁的过滤器。为了探索这个概念，研究了在张力下的螺旋纤维束结构。提出了描述螺旋结构几何形状的理论。然后，针对这些螺旋结构，使用层压板单元，梁单元和带接触的实体单元，开发了几种类型的有限元模型，并在一定角度范围内进行了比较。梁和实体单元模型提供了最佳近似，并表明30度/ 45度纤维结构是良好的角度组合，不仅可以提供显着的径向扩展，而且应力也较低。 3D打印了几个聚合物样品，并在张力下进行了测试。测试证实，螺旋纤维系统表现出拉力行为。聚合物样品显示出比有限元预测更多的径向扩展。因此，螺旋纤维束显示出希望，并将进一步探索。

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  • 来源
    《Composite Structures》 |2018年第5期|310-316|共7页
  • 作者

    Ma Qian; Peel Larry D.;

  • 作者单位

    Texas A&M Univ Kingsville, Dept Mech & Ind Engn, MSC 191,700 Univ Blvd, Kingsville, TX 78363 USA;

    Texas A&M Univ Kingsville, Dept Mech & Ind Engn, MSC 191,700 Univ Blvd, Kingsville, TX 78363 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Auxetic structures; Finite element analysis;

    机译：流变结构;有限元分析;

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