336 GA による傾斜機能中空円筒の材料組成多目的最適化問題 : 気孔率分布の影響

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In this study, we treat multi-objective optimization problem of material composition in a functionally graded hollow cylinder to improve strength against thermal stress and heat resistance against thermal load, simultaneously. Firstly, assuming that the hollow cylinder is subjected to uniform heat supply, theoretical analyses of one-dimensional heat conduction and thermo elastic problems have been developed. Taking into consideration distribution of porosity in the hollow cylinder, material properties of titanium alloy/zirconium oxide type of FGM are estimated by rule of mixture. Next, Pareto optimal solutions of material composition are found by making use of genetic algorithm. Finally, we discuss the effect of pore in Pareto optimal solutions of material composition on improvement of strength and heat resistance in a functionally graded hollow cylinder.
2002-10-10