Influence Mechanism of the Trabecular and Chamfer Radii on the Three-point Bending Properties of Trabecular Beetle Elytron Plates

摘要: To improve the mechanical properties of Trabecular Beetle Elytron Plates (TBEPs, a type biomimetic sandwich structure inspired by beetle elytron) under transverse loads, three-point bending tests are performed to investigate influence trabecular and chamfer radii core on performance TBEPs manufactured 3D printing technology. The results show that can be improved setting reasonable radii; however, excessive increases in these cause decline performance. For reason, two structural parameters enhance deformation stiffness whole connection property between skin, which is also reason why Prosopocoilus inclinatus elytra have thick, short trabeculae with large radius. However, when increase certain extent, cracks ultimately controlled adjacent trabeculae, failure plate determined skin rather than structure. Therefore, this study suggests range for radii, indicates better suited engineering applications high compression requirements general requirements.