Parametric sensitivity analysis to maximise auxetic effect of polymeric fibre based helical yarn

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• 作者：Jack McAfee ; Nadimul Haque Faisal ; ^{N.H.Faisal@rgu.ac.uk}
• 关键词：Helical auxetic yarn (HAY) ; Design parameters ; Negative Poisson&rsquo ; s ratio (NPR) ; Sensitivity ; Parametric analysis ; Safety applications
• 刊名：Composite Structures
• 出版年：2017
• 出版时间：15 February 2017
• 年：2017
• 卷：162
• 期：Complete
• 页码：1-12
• 全文大小：2427 K
• 卷排序：162

文摘

Studies on designing polymeric fibres based helical auxetic yarn (HAY) to maximise their auxetic effect are yet to propose optimised design configurations for general impact mitigation applications. This study therefore presents optimal design parameters through analytical calculations and finite element (FE) method. Three main design parameters were considered which includes Poisson’s ratio, core/wrap diameter ratio, and starting wrap angle. The Poisson’s ratio of the HAY was calculated by measuring its total diameter at a given rate of strain. The investigation found here to be a starting wrap angle of a HAY (critical angle) that resulted in the highest possible exhibiting of the auxetic effect. The critical angle was determined to be 7°, and a maximum NPR of −12.04 was achieved with this design.