Optimizing the Auxetic Geometry Parameters in Few Yarns Based Auxetic Woven Fabrics for Enhanced Mechanical Properties Using Grey Relational Analysis

ABSTRACT

2D woven auxetic fabrics (AF) developed by weave design modification provide a continuous, commercial, and low-cost manufacturing process for high strength and stable auxetic structures. However, AFs developed by previous methods have a highly folded surface, which is problematic in printing, laminating, and stitching. For the first time, we studied the auxeticity in a few yarn-based auxetic structures, which provides a uniform surface texture. Reentrant honey-comb geometry was chosen to fabricate auxetic woven fabrics, as such geometry shows the best auxetic nature. Different parameters of auxetic geometry were optimized based on their mechanical response using the statistical tool: gray relational analysis (GRA). The mechanical properties of AFs were compared with conventional (3/1 twill woven) non-auxetic fabric (NAF), having the same specifications. The smaller unit cell (3E) with a reorientation area of 4P showed optimum auxeticity and mechanical properties. The optimized auxetic structure showed superior mechanical properties as compared to conventional fabric. GRA grade of optimized AF was 67.3% higher than the NAF. Most importantly, the tensile strength was 23% higher for optimized AF structure. The bidimensional energy dissipation ability of the AF provides a key advantage in the superior mechanical response.

摘要

二维机织辅助织物 (AF) 是一种连续的, 商业化的, 低成本的高强度, 稳定辅助结构的制造工艺. 然而, 由先前方法开发的AFs具有高度折叠的表面, 这在印刷, 层压和缝合中是有问题的. 我们首次研究了几种纱基发质的结构中的膨胀性, 它提供了均匀的表面纹理. 选择可重入的蜂巢几何结构来制造发质的机织物, 因为这样的几何结构显示出最好的发质的性质. 利用灰色关联分析 (GRA) 统计工具对不同几何参数的发质的进行了优化. 比较了AFs与相同规格的常规 (3/1斜纹机织物) 非织造布 (NAF) 的力学性能. 再取向面积为4P的小晶胞 (3E) 表现出最佳的辅助性和力学性能. 与传统织物相比, 优化后的发质的结构具有优异的力学性能. 优化AF的GRA评分比NAF高67.3%. 最重要的是, 优化后的AF结构的拉伸强度提高了23%. AF的二维能量耗散能力提供了优越的机械响应的关键优势.

KEYWORDS:

• Auxetic honey-comb geometry
• woven fabrics
• cotton fiber
• mechanical properties
• statistical optimization
• gray relational analysis

关键 字:

• 关键词: 欧式蜂巢几何结构
• 机织物
• 棉纤维
• 机械性能
• 统计优化
• 灰色关联分析

Disclosure statement

No potential conflict of interest was reported by the authors.

Supplementary material

Supplemental data for this article can be accessed on the publisher’s website.