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Biomimetic Research for Folding and Deploying Manners of Monopetalous Flower like Morning Glory

Research Project

Project/Area Number 15560057
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Materials/Mechanics of materials
Research InstitutionOsaka University

Principal Investigator

KOBAYASHI Hidetoshi  Osaka University, Graduate School of Engineering Science, Professor, 基礎工学研究科, 教授 (10205479)

Co-Investigator(Kenkyū-buntansha) DAIMARUYA Masashi  Muroran Institute of Technology, Mechanical Systems engineering, Professor, 工学部, 教授 (40002018)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2004: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2003: ¥2,500,000 (Direct Cost: ¥2,500,000)
KeywordsFolding / unfolding structure / Tensile test / Monopetalous flower / Petal and petal rib / Deploying model of flower / Morning glory / Petunia / 花弁数 / 引張試験 / 花の展開モデル / 花の展開数値モデル / 数値解析
Research Abstract

In this research, the unfolding manner of morning glory and petunia flowers were studied by means of the observation of unfolding manner in buds, the picture analysis of unfolding of flower, tensile tests for petals and petal ribs, construction of the numerical and paper models of flowers and the simulation of unfolding of flower using the models. The principal results obtained are as follows :
1. Morning glory and petunia flowers have compounded structure with petal and petal ribs, i.e. petal ribs support the thin petals. From tensile tests, it was found that the rigidity of petal ribs are about three times greater than that of petals.
2. It was found from simulation of unfolding that the radius of morning glory flower when all petals are released and the energy required for the deployment of a morning glory flower decreases with the increase of the number of petal ribs. However, when the number of petal ribs in a morning glory flower increases, the overlapped petal thickness increases dramatically and consequently it becomes difficult to put the rolled petals in a small bud.
3. The deploying radius of morning glory flower follows the logistic curve which is a basic growth curve, i.e. the slow deploying speed in the early stage, high speed in the middle and again slow in the last.
4. Petunia flower deploys slowly for the first 1619 hours up to 15 % deployment and quickly for the second 3〜4 hours up to 40 % deployment. And then, it deploys with relatively high speed after the stagnation of 12〜14 hours.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (9 results)

All 2004 2003 Other

All Journal Article (6 results) Book (2 results) Publications (1 results)

  • [Journal Article] Mechanical Contribution of Laminar Angle in Plant Leaves with Pinnate Venation2004

    • Author(s)
      Hidetoshi Kobayashi, et al.
    • Journal Title

      Proc.1st Asian Pacific Conf.on Biomechanics

      Pages: 21-22

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Mechanical Contribution Laminar Angle in Plant Leaves with Pinnate Venation2004

    • Author(s)
      Kobayashi H., Daimaruya M., Sakurazawa M.
    • Journal Title

      Proc.1st Asian Pacific Conf.on Biomechanics, Osaka, March (Tanaka M.(eds))

      Pages: 21-22

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Foldinf and Unfolding Structure in Plant2004

    • Author(s)
      Kobayashi H.
    • Journal Title

      Handbook for Engineering of Structure (Yagawa et al. eds.) (Maruzen)

      Pages: 819-822

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Mechanical Contribution of Laminar Angle in Plant Leaves with Pinnate Venation2004

    • Author(s)
      Hidetoshi Kobayashi, et al.
    • Journal Title

      Proc.the First Asian Pacific Conf.on Biomechanics

      Pages: 21-22

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Unfolding of morning glory flower as a deployable structure2003

    • Author(s)
      H.Kobayashi
    • Journal Title

      Solid Mechanics and Its Applications 106

      Pages: 207-216

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Unfolding of Morning Glory Flower as A Deployable Structure2003

    • Author(s)
      Kobayashi H., Daimaruya M., Fujita H.
    • Journal Title

      Solid Mech.and Its Appl. Vo1.106

      Pages: 207-216

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] 構造工学ハンドブック(植物の折畳み構造を担当)2004

    • Author(s)
      編集委員長 矢川元基(小林秀敏:分担執筆)
    • Total Pages
      1006
    • Publisher
      丸善株式会社
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Book] 構造工学ハンドブック2004

    • Author(s)
      編集委員長 矢川元基(小林秀敏:分担執筆)
    • Total Pages
      1006
    • Publisher
      丸善株式会社
    • Related Report
      2004 Annual Research Report
  • [Publications] H.Kobayashi: "Unfolding of morning glory flower as a deployable structure"Solid Mechanics and Its Applications. 106. 207-216 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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