Abstract
A new method to design laminated composite pressure vessels under strain and strength constraints is proposed in this paper. A graphical analysis is presented to find optimum layer thicknesses for given fiber orientations. Minimum pressure vessel mass is determined from active execution of two constraints. Replacing circumferential layer by second helical layer is suggested as a new way of strain suppressing among the commonly used ways for strain suppressing such as (1) addition of extra plies and (2) use of composite material with a higher stiffness. Numerical results and graphics are given to obtain optimum laminate configuration.
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