摘要
以风机叶片用多轴向经编复合材料为研究对象,将四轴向的玻璃纤维多轴向布与环氧树脂经树脂膜溶渗成型方法实现成型。分别测试了四轴向经编复合材料沿不同方向的拉伸、弯曲性能,得到不同轴向材料断裂截面形状,通过比较弹性模量和强度分析了纤维排列对复合材料力学性能的影响。最终确定四轴向经编复合材料沿不同方向力学性能由高到低分别为0°方向、±45°方向、90°方向。这是由于经编纱沿90°方向造成的应力集中,同时,由于经编针的穿刺造成沿90°方向纱线受损最大而导致沿90°方向力学性能最差。
This paper takes multi-axial warp knitted composites used for fan blades as the object of study.The four-axial glass fiber,multi-axial fabrics and epoxy resin film were dissolved by infiltration molding method to achieve molding.Tensile and bending properties of four-axial warp knitted composites along different directions were tested respectively,and fracture cross section shapes of different axial materials were gained.The effect of fiber arrangement on mechanical properties of composites was analyzed through comparing elastic modulus and strength.Finally,the ranking of mechanical properties of four-axial warp knitted composites along different directions was confirmed,i.e.0°,±45°and 90°.Since the warp knitted yarn causes stress concentration along 90°direction,and the puncture of warp knitted yarn results in the maximum damage to the yarn along 90°direction,mechanical properties along 90°direction is worst.
出处
《现代纺织技术》
北大核心
2016年第5期20-24,共5页
Advanced Textile Technology
基金
国家自然科学基金项目(1146-2016)
关键词
四轴向经编织物
复合材料
拉伸性能
弯曲性能
弹性模量
four-axial warp knitted fabrics
composites
tensile properties
bending properties
elastic modulus
