Stab-resistance of auxetic weft-knitted fabric with Kevlar fibers at quasi-static loading. (April 2021)

• Record Type: Journal Article
• Authors: Sun, Yaxin; Xu, Wanli; Wei, Wenfang; Ma, Pibo; Xia, Fenglin
• Is Part Of: Journal of industrial textiles. Volume 50:Number 9(2021)
• Page Start: 1384
• Page End: 1396
• Publication Date: 2021-04
• Subjects: Auxetic -- weft-knitted fabric -- Kevlar fibers -- Poisson's ratio value -- quasi-static stab resistance -- puncture speed; Textile fabrics -- Periodicals; Textile industry -- Periodicals; 677.005
• DOI: 10.1177/1528083719865044
• Languages: English
• ISSNs: 1528-0837

Abstract

In this paper, a novel auxetic weft-knitted fabric was firstly designed, which was based on the rhombus-shaped grid re-entrant structure. Then the fabric was fabricated using Kevlar filament yarn with 200D fineness on a computerized flat knitting machine. And the Poisson's ratio values in weft, warp, and diagonal directions of this weft-knitted fabric were measured. The results showed that it exhibits the negative Poisson's ratio effect in all three directions. Then the quasi-static stab resistance tests at five different puncture speeds were carried out on this auxetic weft-knitted fabric and the plain weft-knitted fabric with same raw material and similar loop length. The experimental results show that the auxetic weft-knitted fabric has higher peak load and energy absorption capacity at quasi-static loading. The results also show that the quasi-static stab resistance of the auxetic weft-knitted fabric strengthens with the increase of the puncture speed, but changes little after the puncture speed reaches a certain value (50 mm/min).