COMPUTATIONAL STRUCTURAL INTEGRITY ANALYSES OF A CANARD BOX-WING UNMANNED AERIAL VEHICLE (UAV) PLATFORM FOR DISASTER MANAGEMENT AND AGRICULTURAL SURVEILLANCE APPLICATIONS
The modern concern on energy, efficiency, and environment leads to developing an unconventional unmanned aerial vehicle (UAV) platform of box-wing configuration for agricultural surveillance, risk and disaster management, and other civilian applications. The box-wing structure used in this study follows Prandtl’s best wing system, which gives the least induced drag for a given wingspan and height. In this study, the researchers evaluated the structural integrity of the designed UAV using finite element method software. For stress analyses, the aerodynamic loads resulting from the computational fluid dynamics (CFD) simulations were exported to the finite element method solver in SolidWorks™ for stress analyses. The maximum stresses with and without gust are and , respectively, which are still below the rupture strength of Balsa wood which is at . The designed UAV was equipped with a spring-damper system to avoid severe damage due to impact forces during landing. The front and aft wings have flutter speeds of and , respectively. The designed Prandtl box-wing was able to reach . When a wind gust of was cyclically applied, the load factor reaches up to 2.5 without detrimental effects observed in the structure. The overall computational fluid dynamics and structural analysis results showed that the designed box-wing UAV for efficient disaster management and surveillance applications could perform well and withstand the projected loading conditions during various flight missions.