织物表面防刺割树脂片形状的确定

为选出最佳的树脂片几何形状以提高材料防刺性能，采用CAD对规则排列面积相同的正方形、等边三角形、正六边形和圆形四种树脂片进行作图分析，并通过理论计算比较树脂片之间的空隙宽度和空隙面积。空隙宽度和空隙面积越小，刀具越难刺入，此种形状的树脂片的防刺能力越好。研究结果表明：对紧密相切排列的的正方形、等边三角形、正六边形和圆形而言，正方形、等边三角形和圆形会使树脂片之间产生直线行列，刀具很容易穿过直线行列伤害人体；对规则排列、树脂片间留有空隙的多边形和圆形而言，当空隙率一定且树脂片面积相同时，正六边形树脂片之间的空隙宽度更窄，空隙面积更小，刀具更难刺入，即正六边形的树脂片有利于提高材料的防刺性能。

Determination about geometry of stab-resistant resin flakes on surface of fabric

In order to select the best geometry of esin flakes to improve stab resistance,four kinds of resin flakes (squares,equilateral triangles,hexagons and circles) with the same area were drawn out by the CAD,and then void width and void area were theoretically calculated and analyzed.The results show that for squares,equilateral triangles,hexagons and circles of closely tangency permutation,the squares,equilateral triangles and circles make straight lines between the flakes,and the cutting tool is easy to pass through the linear procession to harm human body.For polygonal and circular resin flakes,when the void fraction is constant and the resin flake area is the same,the width of the gap between the regular hexagonal resin flakes is narrower and the void area between every two hexagonal resin flakes is smaller,thus the cutting tool is hard to penetrate.In summary,the hexagonal resin flake is conducive to improve the stab resistance of materials.