Multi-scale deterministic optimisation of blended composite structures: case study of a box-wing

This work presents a multi-scale design methodology for the deterministic optimisation of thin-walled composite structures integrating global–local approach assessment buckling strength and dedicated strategy to recover blended stacking sequences. The is based on two-level anisotropic materials structures. In first step, focused macroscopic scale, several requirements are included in problem formulation: lightness, feasibility, manufacturing, blending, failure, static failure stiffness. second which focuses laminate mesoscopic deals with recovery sequences, structure at hand, matching optimal geometric elastic properties determined step. As case study, unconventional PrandtlPlane box-wing system used show effectiveness proposed methodology.