Akademik Veri Yönetim Sistemi
Journal of the Brazilian Society of Mechanical Sciences and Engineering, cilt.48, sa.9, 2026 (SCI-Expanded)
This study investigated the bending performance of 3D-printed adhesively bonded sandwich core structures produced from multiple materials and assessed their potential use as structural components and energy absorbers in UAVs, considering their load-carrying capability and crashworthiness characteristics. PLA, ABS, and TPU were selected for sandwich core structures because they provide rigidity, moderate strength with high deformability, and flexibility, respectively. The study aimed to integrate these mechanical properties into a single sandwich core structure using an adhesive bonding method. The novelty of this study lies in the use of an adhesive bonding method as a practical and effective approach to overcome weak interfacial bonding in multi-material 3D-printed honeycomb sandwich core structures. The bending behavior of ten honeycomb sandwich core configurations with various material stacking sequences was determined using a three-point bending test. While the use of TPU in sandwich core configurations decreased load-carrying capacity, it improved the deformation capability of the sandwich core structures. Configurations 5 and 6 showed 1.16–2.1 times higher energy absorption than monolithic and single-material adhesively bonded sandwich cores. Considering the load-carrying capacity and specific energy absorption capability, Configuration 6 exhibited promising potential for use in structural components and energy absorption applications in UAVs, as ABS was used in the top region and PLA in the bottom region, where normal stress reaches its maximum, while flexible TPU was placed in the middle region, where shear stress is highest. Among the hybrid material structures, Configuration 6 exhibited 46.2% and 439.4% higher load-carrying capacity and energy absorption capability, respectively, compared to Configuration 10, which showed the lowest mechanical performance.