Mechanical Response of Novel 3D Woven Flax Composites with Variation in Z Yarn Binding

ABSTRACT

This paper is focused on the development of novel 3D woven flax composites for improved mechanical performance. The 3D woven interlock fabrics were produced on dobby loom using novel weaving patterns, with variation in binding point density (four different levels). These fabric structures were then used to fabricate composites with green epoxy resin as a matrix. Tensile, flexural, short beam shear, impact (pendulum and drop weight) and compression after impact properties were characterized. It was found that 3D woven composites having higher binding point density showed overall improved mechanical behavior, i.e. the out-of-plane properties were enhanced whereas in-plane properties are either reduced or unaffected.

摘要

本文主要研究开发新型3D机织亚麻复合材料以提高机械性能。在多臂织机上用新颖的织造图案生产三维机织联锁织物，其结合点密度不同（四个不同的水平）。然后将这些织物结构用于制造以绿色环氧树脂为基质的复合材料。拉伸，弯曲，短梁剪切，冲击（摆锤和落锤）和冲击后的压缩特性进行了表征。研究发现，具有较高结合点密度的3D机织复合材料表现出总体改善的力学性能，即面外性能提高，而面内性能降低或不受影响。

KEYWORDS:

• Flax yarn
• green composites
• mechanical performance
• 3D woven reinforcement
• Z yarn binding point density

关键词:

• 亚麻纱
• 绿色复合材料
• 机械性能
• 3D机织增强
• 纱线结合点密度