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

McAfee, Jack; Faisal, Nadimul Haque

Authors

Jack McAfee

Nadimul Haque Faisal



Abstract

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{deg}, and a maximum NPR of -12.04 was achieved with this design.

Journal Article Type Article
Publication Date Feb 15, 2017
Journal Composite structures
Print ISSN 0263-8223
Electronic ISSN 1879-1085
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 162
Pages 1-12
Institution Citation MCAFEE, J. and FAISAL, N.H. 2017. Parametric sensitivity analysis to maximise auxetic effect of polymeric fibre based helical yarn. Composite structures [online], 162, pages 1-12. Available from: https://doi.org/10.1016/j.compstruct.2016.11.077
DOI https://doi.org/10.1016/j.compstruct.2016.11.077
Keywords Helical auxetic yarn (HAY); Design parameters; Negative Poisson's ratio (NPR); Sensitivity; Parametric analysis; Safety applications

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