Manufacture and mechanical characterization of sandwich composites made from a polyurethane resin and jute sewing 3D-fabrics reinforcements

This article aims to develop a new type of sandwich composite with jute sewing 3D-fabrics structure. The sandwich composite was a lightweight composite with reasonable mechanical properties and was manufactured by compression molding. The jute sewing 3D-fabrics was 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.

本研究旨在开发一种采用黄麻缝制三维织物结构的新型夹芯复合材料。该夹芯复合材料为兼具良好力学性能的轻质复合材料，通过模压成型工艺制备而成。所述黄麻缝制三维织物是以凯夫拉（Kevlar）纤维线缝制结构可灵活配置的黄麻纱线制成。本研究对该复合材料开展了压缩、弯曲及冲击性能测试，并采用扫描电子显微镜（Scanning Electron Microscopy）对其断口形貌进行了表征。对比了空白复合材料与夹芯复合材料的压缩及冲击性能；针对弯曲性能，分析了三种典型的弯曲失效模式。