Compression and Shear Response of 3D Pierced Fabric Cf/C Composite

A 3D Carbon-Carbon (Cf/C) composite with fabric reinforcement is of interest in applications where flexural loads are dominant, such as in the wings and control surfaces of aircraft and missile systems. Investigating the mechanical properties of these composites is crucial for understanding their performance, especially for designing and analysing composite structures used in extreme conditions. In this research paper, the compression and shear responses of the 3D PF Cf/C composite samples have been determined at room temperature. The samples were machined in the directions of XY, XZ, and ZX, respectively. Then, the Iosipescu shear test and the short beam shear test were employed to evaluate the shear strength and shear modulus of the composite samples, respectively. The material exhibits a strain to failure of around 0.15% in the X direction with a modulus of 54 GPa. In the Z direction, it deforms more, with a strain to failure of approximately 20% and a modulus of 6.2 GPa.