Concurrent topology optimization of coated structure for non-homogeneous materials under buckling criteria

This study used an adaptive mapping technique to examine multiscale bucking optimal topology for structural coating. The adaptive geometric components (AGCs) include a framework of macro-sandwich bars representing a macrostructure with a solid coating and a group of micro-solid bars representing the nonuniform concurrent at the microstructural scale. The layout of optimized design, comprising the coated layer, and the interior microscale are together designed with buckling constraints. The properties of material change in a certain direction in response to a specified variation in the macro- and microstructures, designed using functionally graded materials. Examining the optimal AGC geometries under buckling constraints yielded a structure with asymmetric stiffness qualities. Furthermore, a comparison of different structures, including solid, lattice, and coating of concurrent structures, under buckling constraint was conducted and is presented herein. The some examples of maximizing structural stiffness, used as an objective under buckling constraints, confirm that the approach of proposed method works effectively and yields satisfactory results.