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Peculiar stress-strain behavior of elastomer foams revealed by X-ray CT and mechanical measurements with various deformations

Research Project

Project/Area Number 15H03868
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Polymer/Textile materials
Research InstitutionKyoto Institute of Technology

Principal Investigator

Urayama Kenji  京都工芸繊維大学, 材料化学系, 教授 (20263147)

Co-Investigator(Kenkyū-buntansha) 西川 幸宏  京都工芸繊維大学, 材料化学系, 准教授 (60332285)
Project Period (FY) 2015-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000)
Fiscal Year 2017: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2016: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2015: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Keywordsエラストマー / 発泡 / 大変形 / 圧縮 / 高分子構造・物性 / ゴム / 力学特性 / 座屈 / 多孔質 / フォーム / 二軸伸長 / 非線形弾性
Outline of Final Research Achievements

Large deformation behavior of elastomer foams with different cell-types (closed- or open cells) is investigated by various types of deformation. Independently of cell type, the stress-strain behavior in tension and compression can not be commonly expressed by a strain energy function, unlike incompressible elastomers. Poisson's ratio in tension is estimated to be ca. 0.25 regardless of cell type, while Poisson's ratio in compression is almost zero for open cells. X-ray CT observation reveals the occurrence of the buckling deformation of constitutive cells under compression. The stress-strain data in uniaxial and biaxial tension are well described by the strain energy function without cross-effect of strains, independently of cell type.

Academic Significance and Societal Importance of the Research Achievements

発泡エラストマーは軽量かつ高圧縮性のために様々な工業用途に用いられている。用途に応じて,独立気泡や連続気泡など気泡の分散形態が異なるエラストマーが用いられている。気泡の分散形態と圧縮挙動についてはよく調べられているが,伸長挙動についてはほとんど調べられていない。本研究成果は,発泡エラストマーは伸長と圧縮では,気泡セルの座屈挙動の有無があるために,その挙動が著しく異なることを明確に示した。対照的に気泡を含まないエラストマーの場合,伸長側のひずみエネルギー密度関数が信頼性に足るものであれば,圧縮挙動は高精度で予測できる。

Report

(4 results)
  • 2018 Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • 2015 Annual Research Report
  • Research Products

    (11 results)

All 2018 2017 2016 2015

All Journal Article (5 results) (of which Peer Reviewed: 4 results) Presentation (6 results) (of which Int'l Joint Research: 4 results,  Invited: 6 results)

  • [Journal Article] New Aspects of Nonlinear Elasticity of Polymer Gels and Elastomers Revealed by Stretching Experiments in Various Geometries2017

    • Author(s)
      Kenji Urayama
    • Journal Title

      Polymer International

      Volume: 66 Issue: 2 Pages: 195-206

    • DOI

      10.1002/pi.5153

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Journal Article] <b>Characterization of Finite Deformation Behavior of Polymer Gels by </b><b>Means of Biaxial Stretching </b>2016

    • Author(s)
      浦山健治
    • Journal Title

      Journal of Network Polymer,Japan

      Volume: 37 Issue: 1 Pages: 12-20

    • DOI

      10.11364/networkpolymer.37.12

    • NAID

      130005127080

    • ISSN
      1342-0577, 2186-537X
    • Related Report
      2016 Annual Research Report 2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 高分子網目系ソフトマテリアルの大変形挙動の解析2016

    • Author(s)
      浦山健治
    • Journal Title

      高分子

      Volume: 65 Pages: 215-217

    • Related Report
      2016 Annual Research Report
  • [Journal Article] Nonlinear Stress-Strain Behavior of Elastomer Foams Investigated by Various Types of Deformation2016

    • Author(s)
      Iba, H., Nishikawa, Y., Urayama, K.
    • Journal Title

      Polymer

      Volume: 83 Pages: 190-198

    • DOI

      10.1016/j.polymer.2015.12.021

    • Related Report
      2016 Annual Research Report 2015 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Velocity Transition in the Crack Growth Dynamics of Filled Elastomers: Contributions of Nonlinear Viscoelasticity2016

    • Author(s)
      Morishita, Y., Tsunoda, K., Urayama, K.
    • Journal Title

      Physical Review E

      Volume: 93 Issue: 4 Pages: 043001-043001

    • DOI

      10.1103/physreve.93.043001

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] Nonliear Elasticty and Diffusio-Mechanical Coupling in Polymer Gels Revealed by Multiaxial Stretching2018

    • Author(s)
      Kenji Urayama
    • Organizer
      American Physical Society, March Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Stretching of Polymer Gels: Why Biaxial?2017

    • Author(s)
      Kenji Urayama
    • Organizer
      The 11th International Gel Symposium (GelSympo 2017)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Characterization of Large Deformation Behavior of Elastomers and Gels: Why Biaxial?2016

    • Author(s)
      Kenji Urayama
    • Organizer
      The 11th SPSJ International Polymer Conference (IPC2016)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Novel Aspects of Nonlinear Elasticity in Elastomers and Gels Revealed by Biaxial Deformation2015

    • Author(s)
      浦山健治
    • Organizer
      The 5th International Symposium on Advanced Polymer Materials and Fiber Science
    • Place of Presentation
      京都工芸繊維大学(京都府京都市)
    • Year and Date
      2015-11-24
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] エラストマー・ゲル材料の力学特性の解析と制御2015

    • Author(s)
      浦山健治
    • Organizer
      高分子学会Webinar講演
    • Place of Presentation
      高分子学会(東京都中央区)
    • Year and Date
      2015-09-08
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] ゴム・エラストマーの力学 ~特に大変形挙動について2015

    • Author(s)
      浦山健治
    • Organizer
      高分子基礎物性研究会
    • Place of Presentation
      東京工業大学(東京都目黒区)
    • Year and Date
      2015-07-13
    • Related Report
      2015 Annual Research Report
    • Invited

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Published: 2015-04-16   Modified: 2020-03-30  

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