Optimization of Deflection Under Static Loading of Laminated Stiffened Cylindrical Shell with Cutout

Deflection under static loading of a laminated anti-symmetric angle-ply stiffened cutout cylindrical shell is analyzed. Optimization of static deflection is performed using response surface methodology (RSM). Finite element analysis (FEA) is used for performing the numerical experiments on the structure. Three input parameters, namely the number of laminate layers, fiber orientation angle, and boundary conditions are varied for calculating the static deflection. Three levels for each parameter are considered. The response values are obtained, and the optimum levels for each parameter for minimum deflection are evaluated. Regression analysis is used for computing response values at any level of input parameters. Residual plots and an ANOVA table confirm the adequacy of the present model. Combined effects of input parameters on the response are shown by surface plots and contour plots. Fiber orientation angle and boundary condition appear to be the most significant factor controlling deflection.