Abstract
For the method to optimize stacking sequences and number of plies of composites, the present paper proposes a new intron method. The intron method is developed from the recessive gene like repair method that is employed for implements of stacking-sequence constraints without causing decrease of the design reliability of GA. The intron method is attempted for the optimizations of laminated cylinders to maximize the buckling load and to minimize the number of plies. As a result, the intron method successfully obtained the real optimal stacking sequences and the number of plies without decrease of design reliabilities.
