Influence of Structures of Fiber 3D Composites on Their Mechanical Properties

In this paper,the mechanical properties of resin based nicked plated carbon fiber 3D composite materials with different structures are investigated,including the effects of 3D five-direction and 3D three orthogonal braiding composites on tensile strength and impact strength of the composite.Mechanical properties test results indicate that two kinds of specimens,both five-direction braiding composites and three orthogonal braiding composites achieve high mechanical properties,and the tensile strength and impact strength of 3D five-direction braiding composites are higher than that of 3D three orthogonal braiding composites,and the tensile strength of 3D five-direction composite reaches to 920MPa,the impact strength reaches to 150 kJ/m2.The mechanical properties of 3D braiding composites are determined by their designed braiding structure.