曲面结构经编多轴向玻璃纤维复合材料制备及弯曲性能  

Preparation and bending properties of curved structure composite reinforced with multi-axial warp-knitted glass fabric

作　　者：徐海南 刘策 杨金伟 高晓平[1] XU Hainan;LIU Ce;YANG Jinwei;GAO Xiaoping(College of Light Industry and Textiles,Inner Mongolia University of Technology,Hohhot 010080,China)

机构地区：[1]内蒙古工业大学轻工与纺织学院,呼和浩特010080

出　　处：《复合材料学报》2023年第8期4506-4516,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51765051);内蒙古自然科学基金(2021 MS01010)。

摘　　要：分别以双轴向和四轴向经编玻璃纤维织物为增强体,基于真空辅助树脂传递模塑成型工艺制备平板和曲面结构复合材料试样。实验测试复合材料弯曲性能和准静态压痕特性,实验测试不同铺层结构试样沿不同方向(0°和90°)的弯曲性能。在此基础上,分析增强体铺层结构、曲率半径对曲面结构复合材料准静态压痕特性的影响。结果表明:双轴向经编玻璃纤维复合材料试样沿0°和90°方向当量弯曲强度分别比四轴向编玻璃纤维复合材料增加94.74%、98.37%,四轴向经编玻璃纤维复合材料试样沿0°和90°方向的最大断裂应变分别是双轴向经编玻璃纤维复合材料试样的1.9倍和2.4倍。当双轴向复合材料曲率半径为260 mm、四轴向复合材料曲率半径为150 mm时,承载能力最优;当双轴向复合材料曲率半径为150 mm、四轴向复合材料曲率半径为80 mm时,应变特性最优。实验结果为曲面结构玻璃纤维复合材料在各类室外建筑穹顶构件的应用提供借鉴。Biaxial warp-knitted glass fabric and quadriaxial warp-knitted glass fabric were used as reinforcement,respectively.The flat and curved structure samples were prepared by applying the vacuum assisted resin transfer molding process.The bending behavior and quasi-static indentation characteristics of composite specimen were experimentally tested,and the influence of the reinforcement structure on the bending behavior of the composite in0° and 90° directions was analyzed.On this basis,the influences of the reinforcement structure and the radius of curvature of the sample on the quasi-static indentation characteristics were also analyzed.Results show that the equivalent bending strength of the composite reinforced with biaxial warp-knitted fabric in 0° and 90° directions increase by 94.74% and 98.37%,respectively in comparison with that of the quadriaxial warp-knitted fabric,and the maximum fracture strain of the quadriaxial warp-knitted fabric in 0° and 90° directions are 1.9 times and 2.4 times than that of the biaxial warp-knitted fabric.When the curvature radius of biaxial composite is 260 mm and the curvature radius of quadriaxial composite is 150 mm,the bending strength of the two materials are optimal.When the curvature radius of biaxial composite is 150 mm and the curvature radius of quadriaxial composite is 80 mm,the fracture strain of the two composites are optimal.The experimental results will provide guidance for application of curved structure composite in various large outdoor building domes.

关 键 词：多轴向经编复合材料 曲面结构 真空辅助成型工艺 弯曲强度 应变特性 

分 类 号：TB332[一般工业技术—材料科学与工程]