Mechanics of fine structures considering surface energy and its application to shape control

• Project/Area Number: 15K17934
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Materials/Mechanics of materials
• Research Institution: Hokkaido University
• Principal Investigator: Takahashi Kosuke 北海道大学, 工学研究院, 准教授 (60619815)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000); Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
• Keywords: Capillarity / Surface energy / Microstructures / Elastocapillary / 表面エネルギー / ぬれ性 / マイクロ・ナノ工学 / 分子動力学計算

Outline of Final Research Achievements

In this study, a new method of manufacturing cylindrical structure in small scale was proposed. When a thin film floated on water is pulled up, it automatically deforms due to capillarity and eventually wraps liquid drop to form a cylindrical structure. The proposed method was confirmed by polymer films and rubber sheets in various dimensions. In addition, an analytical model was established to predict size of the cylindrical structure and maximum thickness of films for formation. Molecular dynamics simulation was also conducted to show the manufacturing a graphene roll from graphene sheet.

Research Products

• [Journal Article] Wetting-induced attraction of thin plates due to capillary flow (2016)
  • Author(s): Kousuke TAKAHASHI, Takahiro MATSUO, Masakazu FURUTA, Shuzo OSHIMA, Kazuaki INABA, Kikuo KISHIMOTO
  • Journal Title: Mechanical Engineering Letters Volume: 2 Issue: 0 Pages: 16-00227-16-00227
  • DOI: 10.1299/mel.16-00227
  • NAID: 130005264455
  • ISSN: 2189-5236
  • Peer Reviewed / Acknowledgement Compliant
• [Presentation] ぬれ性起因の平板変形を利用した円筒構造形成 (2017)
  • Author(s): 檜作大樹, 高橋航圭, 因幡和晃, 岸本喜久雄
  • Organizer: 日本機械学会 M&M2017 材料力学カンファレンス
• [Presentation] 微細構造体の表面エネルギーに起因する吸着力・接着力の評価に関する研究 (2017)
  • Author(s): 高橋航圭
  • Organizer: 日本機械学会 M&M2017 材料力学カンファレンス
  • Invited
• [Presentation] Capillary Induced Fabrication of Cylindrical Structures (2017)
  • Author(s): Kosuke Takahashi, Daiki Hizukuri, Kazuaki Inaba, Kikuo Kishimoto
  • Organizer: The 7th East Asia Mechanical and Aerospace Engineering Workshop
• [Presentation] Characterization of interfacial strength between fiber and matrix based on image analysis of photoelasticity (2016)
  • Author(s): Kosuke Takahashi, Bentang A. Budiman, Kazuaki Inaba and Kikuo Kishimoto
  • Organizer: 17th European Conference on Composite Materials
  • Place of Presentation: Munich, Germany
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] Evaluation of capillary attraction between thin plates (2016)
  • Author(s): Kosuke Takahashi, Shuzo Oshima, Kazuaki Inaba and Kikuo Kishimoto
  • Organizer: The 6th East Asia Mechanical and Aerospace Engineering Workshop
  • Place of Presentation: Tainan, Taiwan
  • Year and Date: 2016-06-02
  • Int'l Joint Research
• [Presentation] Evaluation of interfacial strength of fiber/matrix in composites by characteristic length of Tresca stress contour (2015)
  • Author(s): Kosuke Takahashi, Bentang Arief Budiman, Kazuaki Inaba, Kikuo Kishimoto
  • Organizer: The 3rd International Workshops on Advances in Computational Mechanics
  • Place of Presentation: KFC Hall & Rooms at Ryogoku, Tokyo, Japan
  • Year and Date: 2015-10-12
  • Int'l Joint Research / Invited
• [Presentation] Dependence of Capillary Speed on Capillary Bending of Thin Plates (2015)
  • Author(s): Kosuke Takahashi, Masakazu Furuta, Shuzo Oshima, Kazuaki Inaba, Kikuo Kishimoto
  • Organizer: ASME 2015 Applied Mechanics and Materials Conference, McMAT2015
  • Place of Presentation: Seattle, US
  • Year and Date: 2015-06-29
  • Int'l Joint Research