Effect of Lay‐Up Method on Preparation of GO ‐ CF / BF Hybrid Reinforced Composites by 3D Printing and Vacuum Infiltration Hot Pressing System

ABSTRACT In this study, graphene‐carbon fiber/basalt fiber (GO‐CF/BF) hybrid reinforced composites were prepared using fused deposition 3D printing technology with vacuum infiltration hot press molding process. The effects on microstructure and shape memory properties were comparatively analyzed by adding shape memory polymer (SMP) and changing the lay‐up method. The results showed that, in terms of density and porosity, the density and porosity of the composites showed a decreasing trend due to the low density and low porosity characteristics of the SMP, and the density and porosity of the composites increased with the increase of the BF content due to the large bulk density of the BFs and the poor interfacial bonding ability with the matrix. In terms of shape memory properties, the addition of SMP can increase the fixation rate and recovery rate of GO‐CF/BF hybrid reinforced composites, and with the increase of BF content, the fixation rate increases and the recovery rate decreases. In terms of flexural properties, the flexural strength of the composites gradually decreased from 675.58 to 400.45 MPa with the increase of BF content due to the low modulus and strength of BFs and the low bonding rate with the matrix.