Dynamic thermo-mechanical and impact properties of helical auxetic yarns
Dynamic thermo-mechanical and impact properties of helical auxetic yarns
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DOI：
10.1016/j.compositesb.2016.05.059
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发表时间：
2016-08
影响因子：
13.1
通讯作者：
Guanhua Zhang;O. Ghita;K. Evans
中科院分区：
文献类型：
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作者：
Guanhua Zhang;O. Ghita;K. Evans
本文对螺旋拉胀纱线（HAY）的动态热机械性能和冲击性能进行了实验研究。使用挤出工艺制造的一系列热塑性聚氨酯（TPU）芯纤维已经用超高分子量聚乙烯（UHMWPE）包裹物或不锈钢丝包裹物包裹以形成螺旋拉胀纱线。动态力学分析（DMA）的测量结果表明，核/包直径比和初始包角显着影响的动态热机械行为的HAY。冲击试验结果表明，纤维性能、冲击速度和初始包角对HAY的冲击响应有很大影响。重要的是，在这项工作中，它表明，可以找到一个最佳的包角，给出最佳的刚度，能量吸收和拉胀性能的HAY的组合。
This paper presents an experimental investigation of the dynamic thermo-mechanical and impact properties of helical auxetic yarns (HAYs). A series of thermoplastic polyurethane (TPU) core fibres fabricated using an extrusion process have been wrapped with either ultra-high-molecular-weight polyethylene (UHMWPE) wrap or stainless steel wire wrap to form helical auxetic yarns. Dynamic mechanical analysis (DMA) measurements indicated that the core/wrap diameter ratio and the initial wrap angle influenced significantly the dynamic thermo-mechanical behaviour of HAYs. The impact test results have shown that the fibre property, impact velocity and the initial wrap angle had great effect on the impact response of a HAY. Importantly, in this work it is shown that an optimal wrap angle can be found to give the best combination of stiffness, energy absorption and auxetic performance of HAYs.