3D纤维增强复合材料的结构对力学性能的影响

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

摘要: 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。

Abstract: 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.