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New Aspects of Rebound Hardness Testing Method

Research Project

Project/Area Number 25630039
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Design engineering/Machine functional elements/Tribology
Research InstitutionKyushu Institute of Technology

Principal Investigator

MATSUDA Kenji  九州工業大学, 大学院工学研究院, 教授 (40229480)

Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords反発硬さ試験 / 反発係数 / 脆性材料 / 破壊じん性値 / 潤滑油 / ハンマ振動 / 反発試験 / 破壊靭性 / ビッカース硬さ / き裂 / 接触問題
Outline of Final Research Achievements

(1) If a specimen is fixed by inadequate manner, the hammer is released from the specimen surface before the elastic deformation of the specimen has been restored, and then the vibration of the specimen after the impact increases, which results in one of the causes of decreasing in the coefficient of restitution. (2) In the case of the hammer with a pyramidal tip and a high rigidity body, the coefficient of restitution remains almost a constant value irrespective of the existence of the lubricant on the specimen surface and of the impact velocity. (3) There exists a kind of glass of which almost a constant coefficient of restitution can be obtained irrespective of the impact velocity when the hammer mentioned in the above item (2) is used. Furthermore, it becomes clear that the deformation and destructive behaviors of glass due to the collision could strongly affect the hammer motion after the impact.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (4 results)

All 2015 2014 2013

All Presentation (4 results) (of which Invited: 1 results)

  • [Presentation] Rebound Hardness Testing by Using Hammer with Pyramidal Indenter -Effect of Reducing the Impact Force on Restitution Coefficient-2015

    • Author(s)
      Kenji Matsuda,Takeru Hashiguchi,Masanori Suematsu
    • Organizer
      Fifth International Indentation Workshop (IIW5)
    • Place of Presentation
      Texas,USA
    • Year and Date
      2015-11-01 – 2015-11-05
    • Related Report
      2014 Annual Research Report
  • [Presentation] Rebound Hardness Test of Lubricated Surface by Using Spherical and Pyramidal Indenters2015

    • Author(s)
      Shunsuke Miura,Kenji Matsuda
    • Organizer
      International Tribology Conference, Tokyo 2015
    • Place of Presentation
      東京
    • Year and Date
      2015-09-16 – 2015-09-20
    • Related Report
      2014 Annual Research Report
  • [Presentation] 尖端圧子ハンマを用いた反発硬さ試験 -反発係数に及ぼす衝突荷重低減の影響-2014

    • Author(s)
      松田健次,橋口武尊,末松正典
    • Organizer
      日本トライボロジー学会トライボロジー会議2014春 東京
    • Place of Presentation
      東京
    • Year and Date
      2014-05-21
    • Related Report
      2014 Annual Research Report
  • [Presentation] 球体および尖端圧子ハンマによる潤滑面の反発係数の測定2013

    • Author(s)
      松田健次
    • Organizer
      第43回石油・石油化学討論会
    • Place of Presentation
      福岡県北九州市
    • Related Report
      2013 Research-status Report
    • Invited

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Published: 2014-07-25   Modified: 2019-07-29  

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