| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
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| Outline of Final Research Achievements |
During fabrication process of laminated fibrous composites, asymmetric laminates result in skewed surfaces after curing due to strong anisotropy of each layer, and composites with specific lay-ups and dimensions show bi-stable states. The present study performs a multi-objective optimization for the composite shell with bi-stable shapes. Objective functions are amount of averaged deformation between two stable shapes of shell and critical temperature of surroundings which is the maximum temperature to keep the bi-stable characteristics. These properties indicate a trade-off relation each other and are maximized simultaneously by using an effective multi-objective genetic algorithm method. Shell shapes after curing are predicted by the thermal deformation analysis based on the Rayleigh-Ritz method. Calculated results agree well with those from experiments with respect to shell shapes, and the present multi-objective optimization reveals wide-ranging Pareto optimum solutions.
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