Effect of Twisted Fiber on Flexural Property and Microstructure of Woven Fabric Reinforced Composite

• Published in: Journal of Wuhan University of Technology. Materials science edition 2017-08, Vol.32 (4), p.791-794
• Main Author: 杜建华 赵晓琳 YANG Hongwei JIA Chengchang GAO Heng WANG Dafeng Lü Yingying
• Format: Article
• Language: English
• Subjects: Advanced Materials; Bend strength; Chemistry and Materials Science; Composite materials; Epoxy resins; Failure mechanisms; Flexural strength; Hand lay-up; Materials Science; Mechanical properties; Modulus of rupture in bending; Molecular structure; Polymer matrix composites; UHMWPE; Ultra high molecular weight polyethylene; Woven fabrics; Yarns; 加捻; 弯曲性能; 微观结构; 环氧树脂复合材料; 纤维织物; 织物增强复合材料; 超高分子量聚乙烯
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-017-1669-8

Two kinds of 2.5D deep straight-joint structure ultra-high molecular weight polyethylene（UHMWPE）（twisted and original） fibers woven fabric reinforced epoxy resin composites were prepared by the hand lay-up method. Subsequently, the flexural property, microstructures, and failure mechanisms of the composites were also investigated. The average flexural strength of 2.5D deep bend-joint structure twisted fiber and original fiber woven fabric composites were 176.66 MPa and 204.45 MPa, respectively. The results of the characteristics indicated that the twist was the main factor which affected the flexural performance. Flexural property vitally relied on the strength of the fiber itself. Twist decreased the strength of the yarns, which meant that when the mechanical property of woven fabric reinforced composites was improved, the yarns must be kept straight in the woven fabric. The study are extremely valuable to guide the improvement of the mechanical property of the woven fabric reinforced composites.