Development of new functional bi-stable composite shells
Project/Area Number |
26289052
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Dynamics/Control
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Research Institution | Hokkaido University |
Principal Investigator |
Honda Shinya 北海道大学, 工学(系)研究科(研究院), 准教授 (90548190)
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Research Collaborator |
NARITA Yoshihiro 北海道大学, 大学院工学研究院, 名誉教授
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Project Period (FY) |
2014-04-01 – 2017-03-31
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Project Status |
Completed (Fiscal Year 2016)
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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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Keywords | 積層複合材 / 形状双安定性 / シェル形状 / 多目的最適化 / 複合材料 / 振動特性 / 自由形状繊維 / 機械力学 / 最適設計 / 双安定 / 熱可塑性複合材 / 多目的最適設計 / 曲線状繊維 / 局所剛性 / 局所異方性 / 積層理論 / 形状双安定シェル |
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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Report
(4 results)
Research Products
(22 results)
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[Presentation] Evaluation of residual strain in press molding of CF/PPS laminates using FBG sensors2014
Author(s)
Tsukada, T., Takeda, S., Iwahori, Y., Honda, S., Nrita, Y., Minakuchi, S., Takeda, N.
Organizer
the American Society for Composites: Twenty-Ninth Technical Conference
Place of Presentation
La Jolla, California
Year and Date
2014-09-08 – 2014-09-10
Related Report
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