3D纤维增强复合材料的结构对力学性能的影响

研究了树脂基镀镍碳纤维3D复合材料的不同结构,包括三维五向、正交三向结构对3D复合材料拉伸性能和冲击性能的影响。进行了两种试件力学性能的测定,结果表明,三维五向3D复合材料和正交三向3D复合材料都能达到高的力学性能,在纤维体积含量相近的情况下,三维五向3D复合材料的拉伸强度和冲击强度较正交三向3D复合材料高,拉伸强度可达920 MPa、冲击强度达150 KJ/m2。通过对编织结构的设计,可以设计3D复合材料的性能。

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.