Study on the Dynamic Compression Properties of a 0.5 % Graphene/6061 Aluminum Matrix Composite

Dynamic compression experiments were conducted on a 0.5 w/% graphene/6061 aluminum matrix composite using a split Hopkinson pressure bar (SHPB) at varying strain rates. The effects of these strain rates on the mechanical properties and deformation damage of the graphene/6061 aluminum matrix composite were analyzed. The results indicate that the composite exhibits significant strain rate sensitivity; specifically, the yield strength of the composite progressively increases with the rise in compressive strain rate, and high strain rate compression leads to notable grain refinement. Additionally, the finite element method was utilized to establish a corresponding numerical model to simulate impact compression at high strain rates. It was observed that the primary internal damage during the compression process is interface damage. When compared to the experimental results, the trends in mechanical changes are similar, and the error falls within a reasonable range, thereby validating the effectiveness of the finite element simulation.