Design of stiffened panels for stress and buckling via topology optimization

Abstract This paper investigates the weight minimization of stiffened panels simultaneously optimizing sizing, layout, and topology under stress buckling constraints. An effective optimization parameterization is presented using multiple level-set functions. Plate elements are employed to model panels. The stiffeners parametrized by implicit internal topologies optimized as well their layout. A free-form mesh deformation approach improved adjust finite element mesh. Sizing also included. thicknesses skin optimized. Bending, shear, membrane stresses evaluated at bottom, middle, top surfaces elements. p -norm function used aggregate these in a single constraint. To solve problem, semi-analytical sensitivity analysis performed, algorithm outlined. Numerical investigations demonstrate validate proposed method.