2016 Fiscal Year Final Research Report
Development of new functional bi-stable composite shells
Project/Area Number |
26289052
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Dynamics/Control
|
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)
|
Research Collaborator |
NARITA Yoshihiro 北海道大学, 大学院工学研究院, 名誉教授
|
Project Period (FY) |
2014-04-01 – 2017-03-31
|
Keywords | 積層複合材 / 形状双安定性 / シェル形状 / 多目的最適化 |
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.
|
Free Research Field |
機械力学,複合材料工学,最適設計
|