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2004 Fiscal Year Final Research Report Summary

Investigation on the Law Governing Crack Propagation Behaviors (with Sinusoidal or Spiral Cracks as Examples)

Research Project

Project/Area Number 14350051
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

FUJIMOTO Koji  The University of Tokyo, Graduate School of Engineering, Professor, 大学院・工学系研究科, 教授 (40182993)

Co-Investigator(Kenkyū-buntansha) SHIOYA Tadashi  The University of Tokyo, Graduate School of Engineering, Professor, 大学院・工学系研究科, 教授 (30013733)
SATOH Katsuhiko  The University of Tokyo, Graduate School of Engineering, Research Associate, 大学院・工学系研究科, 助手 (30010911)
Project Period (FY) 2002 – 2004
KeywordsCrack / Fracture / Crack propagation / Glass / Sinusoidal crack / Brittle fracture / Elasticity / Continuously distributed dislocations model
Research Abstract

This study aims at clarifying the law governing crack propagation behaviors in order to realize perfect control of crack propagation for applications of fracture to cutting or chopping of engineering materials. As a part of this study, this research project has treated the well known phenomena, (I) sinusoidal (spiral) cracks propagating in a glass plate (tube) lowered into cold water after heated uniformly and (II) sinusoidal crack propagating in high pressure gas tube. The crack propagation behavior and its mechanism were investigated experimentally and theoretically. As a result on (I), it has been observed that the larger the descent speed into water or the heating temperature is, the smaller the wavelength of sinusoidal cracks becomes. Furthermore, thermal stress analysis revealed that a crack is likely to propagate perpendicularly to the water surface when its tip is under the water surface but that it tends to turn to the direction parallel to the water surface when its tip comes up over the water surface. Next, regarding (II), fracture experiments were conducted using glass tubes by pressurizing internally by water. As the results, the followings were clarified. 1.The mechanism of sinusoidal crack propagation is not due to plastic deformation of the pressurized tube. 2.The mechanism of sinusoidal crack propagation is not due to the effect of inertia resulting from the rapid crack propagation. 3.The shapes of sinusoidal cracks are similar to one another in spite of the difference of the diameter or the thickness of specimens. 4.The crack path becomes inclined from the axial direction of the tube due to the effect of anti-plane shear stress. The elastic analysis using the method of continuously distributed dislocations model suggests that the interference between cracks or multi-axial stress effect is an important factor in the mechanism of sinusoidal crack propagation.

  • Research Products

    (18 results)

All 2005 2004 2003 2002

All Journal Article (18 results)

  • [Journal Article] On the Wavy Crack Propagation Behavior in Internally Pressurized Brittle Tube2005

    • Author(s)
      Koji FUJIMOTO
    • Journal Title

      JSME International Journal Vol.48(accepted and to be appeared)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] On the Wavy Crack Propagation Behavior in Internally Pressurized Brittle Tube2005

    • Author(s)
      Koji FUJIMOTO
    • Journal Title

      Proceedings (CD-ROM) of JSME/ASME International Conference on Materials and Processing 2005,Seattle, U.S.A. (to be appeared)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] On the Wavy Crack Propagation Behavior in Internally Pressurized Brittle Tube2005

    • Author(s)
      Koji FUJIMOTO
    • Journal Title

      Abstract Book of JSME/ASME International Conference on Materials and Processing 2005,Seattle, U.S.A. (to be appeared)

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Wavy Crack Propagation in Internally Pressurized Glass Tube2005

    • Author(s)
      Koji FUJIMOTO
    • Journal Title

      Proceedings (CD-ROM) of the 11th International Conference on Fracture, Turin, Italy

      Pages: ID:4104

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Wavy Crack Propagation in Internally Pressurized Glass Tube2005

    • Author(s)
      Koji FUJIMOTO
    • Journal Title

      Abstract Book of the 11th International Conference on Fracture, Turin. Italy

      Pages: 586

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] On the Wavy Crack Propagation Behavior in Internally Pressurized Brittle Tube2005

    • Author(s)
      Koji FUJIMOTO, Tadashi SHIOYA
    • Journal Title

      JSME International Journal Vol.48 (to be appeared)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] On the Wavy Crack Propagation Behavior in Internally Pressurized Brittle Tube2005

    • Author(s)
      Koji FUJIMOTO, Tadashi SHIOYA
    • Journal Title

      Proceedings (CD-ROM) of JSME/ASME International Conference on Materials and Processing 2005 (Seattle, U.S.A.), The Japan Society of Mechanical Engineers (to be appeared)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] On the Wavy Crack Propagation Behavior in Internally Pressurized Brittle Tube2005

    • Author(s)
      Koji FUJIMOTO, Tadashi SHIOYA
    • Journal Title

      Abstract Book of JSME/ASME International Conference on Materials and Processing 2005 (Seattle, U.S.A.), The Japan Society of Mechanical Engineers. (to be appeared)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Wavy Crack Propagation in Internally Pressurized Glass Tube2005

    • Author(s)
      Koji FUJIMOTO, Tadashi SHIOYA
    • Journal Title

      Proceedings (CD-ROM) of the 11th International Conference on Fracture, Turin, Italy ID : 4104

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Wavy Crack Propagation in Internally Pressurized Glass Tube2005

    • Author(s)
      Koji FUJIMOTO, Tadashi SHIOYA
    • Journal Title

      Abstract Book of the 11th International Conference on Fracture, Turin, Italy

      Pages: 586

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 正弦波状き裂の弾性解析2004

    • Author(s)
      藤本浩司
    • Journal Title

      日本機械学会2004年度年次大会講演論文集,Vol.1 No.04-1

      Pages: 439-440

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Elastic Analysis of Sinusoidal Crack2004

    • Author(s)
      Koji FUJIMOTO
    • Journal Title

      Proceedings of Mechanical Engineering Congress, 2004 (Sapporo, Japan), The Japan Society of Mechanical Engineers Vol.1

      Pages: 439-440

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 熱応力によってガラス板に生じる波状き裂の伝播2003

    • Author(s)
      岡田匡史
    • Journal Title

      日本機械学会第11回機械材料・材料加工技術講演会講演論文集 No.03-32

      Pages: 57-58

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 正弦波状き裂について2003

    • Author(s)
      藤本浩司
    • Journal Title

      日本機械学会北海道支部第43回講演会講演概要集 No.032-1

      Pages: 2-3

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Propagation of Wavy Cracks in Glass Plate Caused by Thermal Stress2003

    • Author(s)
      Masashi OKADA, Yohei MAGARA, Koji FUJIMOTO, Katsuhiko SATOH, Tadashi SHIOYA
    • Journal Title

      Proceedings of the 11th Materials and Processing Conference (Tokyo, Japan), The Japan Society of Mechanical Engineers

      Pages: 57-58

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] On the Sinusoidal Cracks2003

    • Author(s)
      Koji FUJIMOTO
    • Journal Title

      Proceedings of the 43rd Congress of Hokkaido Branch, the Japan Society of Mechanical Engineers, Asahikawa, Japan

      Pages: 2-3

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 内圧を受ける円管におけるクラックの進展挙動に関する研究2002

    • Author(s)
      関直喜
    • Journal Title

      日本機械学会2002年度年次大会講演論文集,Vol.II No.02-1

      Pages: 451-452

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Study on Behavior of Crack Propagation in Internally Pressurized Tube2002

    • Author(s)
      Naoki SEKI, Tadashi SHIOYA, Koji FUJIMTO, Katsuhiko SATOH
    • Journal Title

      Proceedings of Mechanical Engineering Congress, 2002 (Tokyo, Japan), The Japan Society of Mechanical Engineers Vol.II

      Pages: 451-452

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2006-07-11  

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