Novel high performance auxetic fibrous structures for composite reinforcement

13th International Conference on Textile Composites

Goncalves, C.^1 ; Magalhaes, R.^2 ; Rana, S.^2 ; Fangueiro, R.^3 ; Nunes, J.^1 ; Dias, G.^1

Institute for Polymers and Composites (IPC), University of Minho, Campus Azurém, Guimaraes

4800-058, Portugal^1

Centre for Textile Science and Technology (2C2T), University of Minho, Campus Azurém, Guimaraes

4800-058, Portugal^2

Department of Mechanical Engineering, University of Minho, Campus Azurém, Guimaraes

4800-058, Portugal^3

关键词: Auxetic structures;    Auxetic textiles;    Composite reinforcement;    Fibrous structures;    Knitting technologies;    Negative poisson's ratios;    Polyamide 6.6;    Star structure;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/406/1/012046/pdf
DOI  :  10.1088/1757-899X/406/1/012046

来源: IOP

【 摘 要 】

This paper reports the development of novel auxetic fibrous structures from high performance yarns using knitting technology for application as reinforcement in composites. Two types of high performance yarns, namely, para-aramid (p-AR) and polyamide 6.6 (PA), were used to produce three distinct auxetic structures: purl, re-entrant lozenge and re-entrant star structures. It was observed that all structures produced could achieve maximum negative Poisson's ratios (NPR) of -0.60, -0.54 and -0.47 in the course direction of purl and lozenge and in wale direction of star structures, respectively. The auxetic textile structures also presented better tensile strength and energy absorption (except re-entrant lozenge structure) than plain knitted textiles produced by using the same type of fibres and parameters.