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Design of laminated cylinder using genetic algorithm

Tabakov P. Y.

Journal of Applied Computer Science

2000

Vol. 8, nr 2

7-29

An approach for the optimal design of thick laminated cylindrical pressure vessels is given. The maximum burst pressure is computed using an exact elasticity solution and subject to the Tsai-Wu failure criterion. The design method is based on an accurate 3-D stress analysis. Exact elasticity solutions are obtained using the stress function approach where the radial, circumferential and shear stresses are determined taking the closed ends of the cylindrical shell into account. Design of multilayered composite pressure vessels is based on the use of an improved genetic algorithm. This approach is highly efficient for many classes of engineering problems. The proposed selection of the best individuals and localized search makes the search more effective and rapidly improves the fitness value from generation to generation. Both continuous and discrete design variables are considered, and a comparative analysis of the performance of the algorithm is studied. Numerical results are given for optimum fiber orientation for both single-layered cylinder and for each layer in the case of thick and thin-walled multilayered pressure vessels.