Optimized synthesis of cylindrical shells of reinforced plastics with elastic filler for stable performance

A cylindrical shell of reinforced plastic with an elastic filler is optimized. Limited local stability and certain geometrical constraints are taken into account. The method of projectable gradients, according to J. B. Rosen, is used for optimizing the design. Optimum reinforcement structures are obtained for a shell, depending on the stiffness of the elastic filler.