Mechanical Properties Testing of Carbon Fiber Reinforced Composites

Abstract

the current research in the field of materials focuses on the analysis of the properties of carbon fiber (CF). There are relatively few studies related to the structural design of CF composite reinforcements in practical applications. In order to improve the traditional laminate structure of aircraft engine blades, CF reinforced epoxy resin matrix composites are used as the research object. Its surface modification method, toughening method, and molding process ae studied. Then, the laminate structure of aircraft engine blades is studied and designed based on CF reinforced epoxy resin matrix composites combined with the concept of bionics. The root, middle, and tip parts of the engine blade are designed with layered structure and angle. Finally, the mechanical properties of the designed blades are tested through experiments. The results show that among the threelayered design structures of the blade root, the bionic synchronous double helix structure of the blade root has the highest tensile strength, which is 419.13MPa. The bending strength of the leaf root bionic variable angle double helix structure is the highest, which is 1349.45MPa. Among the three-layered design structures in the blade, the biomimetic nonlinear structure in the leaf has the highest tensile strength and bending strength values, which are 468.23MPa and 1222.44MPa, respectively. Among the three-layered design structures of the blade tip, the tensile strength and bending strength of the blade tip bionic variable-angle double helix structure are the highest, which are 457.78MPa and 1126.33MPa, respectively. These results provide research experience for further improving the performance of aircraft engines.