Geometric Properties of Hybrid Honeycomb Structures: Impact on Energy Absorption and Structural Adaptation
摘要
This study investigates the mechanical performance of hybrid honeycomb sandwich panels, focusing on their ability to withstand static and dynamic loads. The primary findings demonstrate the advantages of hybrid structures that combine hexagonal honeycomb and reentrant cells. Mechanical strength assessments revealed that the hybrid specimen with a ratio of R3/H2 retained 89% of the flexural strength of the hexagonal configuration (1520 N) while exhibiting 82% of the elongation capacity of the reentrant structure (13.0 mm), indicating a balanced optimization of strength and flexibility. Energy absorption tests showed a significant increase in total fracture energy with the proportion of hexagonal cells, rising from approximately 15.41 J/m2 for fully reentrant (R5-H0) to 17.98 J/m2 for fully hexagonal (R0-H5), highlighting the superior energy dissipation capabilities of the hybrid structures. Impact resistance evaluations revealed that the hybrid configuration R1/H4 absorbed 16.43 J of impact energy, compared to 15.41 J for the fully reentrant structure, underscoring the benefits of integrating hexagonal cells for enhanced stiffness. The row-based hybridization approach allows for precise tuning of mechanical properties, enabling tailored structures to meet specific application demands. Future work will involve calculating the moments of inertia for each specimen to more accurately quantify their resistance to bending and provide deeper insights into the structural advantages of hybrid designs. In summary, hybrid honeycomb sandwich panels present a promising method for optimizing mechanical properties, making them suitable for applications in aerospace, automotive, and other industries where a balance of strength and adaptability is crucial.