Type, structure and orientation angle of the reinforcing material used in laminated composite structures directly affect the mechanical behavior of the composite material. Knitted fabrics are becoming increasingly widespread as reinforcing materials in laminated composites due to their superior mechanical and physical properties. In this study, mechanical properties and fracture toughness of knitted fabric reinforced laminated composites were investigated. 1×1 rib knitted fabric reinforced glass/epoxy and carbon/epoxy laminated composites were produced by hand lay-up method. Mechanical behaviors of the produced composites were determined under tensile, compressive and shear loads. The fracture toughness of the knitted fabric reinforced composites was determined under Mode I (0 °), Mode II (90 °) and Mode I/II (30 °, 45 °, and 60 °) loading conditions by using Arcan test apparatus. In addition, the fracture toughness of glass/epoxy and carbon/epoxy laminated composites were numerically determined using the J integral method in the ANSYS finite element program. Test results have shown that knitted fabrics can be used as an alternative reinforcing material in the production of laminated composites.

层压复合结构中使用的增强材料的类型，结构和取向角直接影响复合材料的机械性能。针织物由于其优异的机械和物理性能而越来越广泛地用作层压复合材料中的增强材料。在这项研究中，研究了针织物增强层压复合材料的机械性能和断裂韧性。通过手工铺网法制备了1×1罗纹针织物增强的玻璃纤维/环氧树脂和碳纤维/环氧树脂层压复合材料。在拉伸，压缩和剪切载荷下确定了所生产复合材料的机械性能。在I型（0°），II型（90°）和I / II型（30°，45°，和60°）的负载条件使用Arcan测试设备。此外，在ANSYS有限元程序中使用J积分法数值确定了玻璃/环氧树脂和碳/环氧树脂层压复合材料的断裂韧性。测试结果表明，针织面料可用作层压复合材料生产中的替代增强材料。