Large-scale manufacturing of helical auxetic yarns using a novel semi-coextrusion process
Large-scale manufacturing of helical auxetic yarns using a novel semi-coextrusion process
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DOI：
10.1177/0040517517725125
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发表时间：
2018-11-01
影响因子：
2.3
通讯作者：
Evans, Kenneth E.
中科院分区：
文献类型：
--
作者：
Zhang, Guanhua;Ghita, Oana R.;Evans, Kenneth E.
介绍了一种新型的螺旋拉胀纱（HAY）的挤出成型工艺。一系列的半共挤HAY已被制造成具有成本效益，一致和易于使用的形式。半共挤HAY的拉伸性能和拉胀行为进行了比较，以传统的纺纱。结果表明，在新制造的半共挤出HAY的拉胀效应的存在。与传统纺丝HAY类似，新型HAY对初始包角、芯/包直径比和组分模量等参数敏感。重要的是，已经确定了一些新的制造参数，用于定制半共挤出HAY的拉胀行为。半共挤HAY拉胀时，瞬时真泊松比分析方法的应用。半共挤HAY由于预成型螺旋缠绕结构的优点而比常规HAY给出更大的最大负泊松比。
This paper introduces a novel extrusion process for manufacturing helical auxetic yarn (HAY). A range of semi-coextruded HAYs have been manufactured in a cost-effective, consistent and readily usable form. The semi-coextruded HAYs were compared to the conventional spun yarns in terms of tensile properties and auxetic behavior. The results show the presence of the auxetic effect in newly fabricated semi-coextruded HAYs. Similar to the traditional spun HAYs, the new HAYs are sensitive to parameters such as the initial wrap angle, the core/wrap diameter ratio and component moduli. Importantly, a few new manufacturing parameters have been identified for tailoring the auxetic behavior of the semi-coextruded HAYs. The semi-coextruded HAYs are auxetic when an instantaneous true Poisson's ratio analysis method is applied. The semi-coextruded HAYs give a larger maximum negative Poisson's ratio than the conventional HAYs due to the advantages of the pre-formed helical wrap structure.