Manufacturing and mechanical characterisation of polyurethane resin based sandwich composites for three-dimensional fabric reinforcement

This article aims to develop a new type of sandwich composite with 3D fabrics structure. The sandwich composite was a lightweight composite with reasonable mechanical properties and was manufactured by compression molding. The 3D fabrics were produced by sewing jute yarns having configurable structures using Kevlar fiber threads. The composites had been subjected to compression, flexural and impact tests and their fracture surfaces had been characterized by scanning electron microscopy. The compression and impact properties of the blank composites and the sandwich composites were compared. In terms of flexural performance, three types of flexural failure modes were analyzed.

本文旨在开发一种新型三维织物结构夹层复合材料。该夹层复合材料为轻质复合材料，兼具优异的力学性能，采用压缩成型工艺制备。该三维织物通过使用凯夫拉（Kevlar）纤维线缝纫结构可定制的黄麻纱线制成。研究团队对该复合材料开展了压缩、弯曲及冲击性能测试，并通过扫描电子显微镜对其断口形貌进行了表征。对比了空白复合材料与夹层复合材料的压缩及冲击性能。针对弯曲性能，分析了三种弯曲失效模式。