In recent years, composite materials usage has increased in several industries because of light weight and high stiffness specifications. Despite these advantages, their design is especially challenging because free parameters of composite design, as fiber materials, number of plies, matrix and fiber directions cause a lot of work for designer to select appropriate combination in comparison with traditional material selection approach. Selected design parameters should provide light weight and high stiffness. Multi-Objective optimization (MOO) technique using evolutinary algorithm is used to select optimum design parameters as both design and optimization method in the same time. Finite element method (FEA) analysis is used to obtain high stiffness of composite structure against to external loads. Coupled solution of MOO and FEA submitted multiple optimum design parameters by providing high stiffness and light weight in composite structure design of passenger ship.
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