Local Optimisation of Anisotropic Composite Panels with T-Shape Stiffeners

摘要: A method to locally optimise anisotropic composite panels with T shape stiffeners is provided. The technique divides the optimisation problem into two levels. At first level, performed using Mathematical Programming (MP), where skin and are modelled lamination parameters accounting for their anisotropy transverse shear stiffness. Skin stiffener laminates assumed be symmetric, or mid-plane symmetric 0, 90, 45 -45 degree ply angles. stiffened panel subjected a combined loading (in-plane out-of-plane) under strength (laminate failure), buckling practical design constraints. Out-of-plane caused by lateral pressure, initial geometric imperfections eccentricities in in-plane loading. manufacture of embedded within variables. Ply contiguity constraints imposed at this level improve convergence towards laminate design. second actual lay-ups obtained Genetic Algorithm (GA), manufacturability practices. This approach benefits from MP complex structural analysis GA discrete lay-up combinational solved. Moreover, modelling enables engineers explore potentially use elastic tailoring advantage.