Abstract
For ultra light MAV (micro air vehicle), low-density expanded polypropylene (EPP) has been noticed with keen interest. In this study, mechanical properties and optimal structure of low-density EPP are investigate by bending test. Bending stiffness is evaluated on the rib,truss,honeycomb internal structures. The deformation of the structures are analyzed using a finite element method and the maximum displacements are compared with experimental data. The results indicate that the honeycomb structure dose exhibit higher stiffness and the weight of structures are reduced by 50%, comparing with the bulk specimen. Bending stiffness is improved by making structures by cutting, compared with bonding structure.
