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Development of a nonlinear acoustic microscope and evaluation of bond integrity

Research Project

Project/Area Number 12555024
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Materials/Mechanics of materials
Research InstitutionNagoya Institute of Technology

Principal Investigator

KAWASHIMA Koichiro  Nagoya Institute of Technology, Graduate School of Engineering, Professor, 工学研究科, 教授 (50023239)

Co-Investigator(Kenkyū-buntansha) NISHIMURA Naoya  Nagoya Institute of Technology, Research Associate, 工学研究科, 助手 (60335099)
HAYASHI Takahrio  Nagoya Institute of Technology, Research Associate, 工学研究科, 助手 (30324479)
ITO Toshihiro  Nagoya Institute of Technology, Associate Professor, 工学研究科, 助教授 (20203151)
古村 一朗  (株)東芝, 電力産業システム開発センター, 主幹
三留 秀人  名古屋工業技術研究所, 構造プロセス部, 室長
杉田 雄二  中部電力(株)電力技術研究所, 研究主幹
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥13,400,000 (Direct Cost: ¥13,400,000)
Fiscal Year 2002: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2001: ¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2000: ¥8,500,000 (Direct Cost: ¥8,500,000)
KeywordsNonlinear ultrasonics / Ultrasonics / Nondestructive characterization / Higher harmonics / Internal defect / Closed crack / Bond interface / 焼結金属 / 表面波 / 欠陥 / 接合面強度 / 位相速度分散
Research Abstract

The purpose of this project is to detect nondestructively minute micro-cracks and/or disbonding in structural materials and bonded interface by using nonlinear ultrasonic waves. The main idea is to detect higher harmonics generated at micro cracks under burst ultrasonic waves of large amplitude of a few tens of nanometers. When the surfaces of minute micro-cracks and/or disbonding are repeatedly dapped or rubbed, then higher harmonics, of which frequency are integral times of the incident wave frequency, are excited.
This project is composed of the followings : (a) measurement technique of 2^<nd> harmonic without bonding piezo elements on the surfaces of materials tested, (b) elimination of nonlinearity of coupling water for immersion measurement, (c) numerical simulation of 2^<nd> harmonic wave with dynamic finite element method in which contact elements are introduced to model nearly dosed cracks or interfaces.
Main results obtained by this projects are summarized in the followings.
1) … More A 2^<nd> harmonic measurement system has built in terms of a burst wave of large amplitude, commercial piezo transducers, and digital signal processing. This system detects A_2/A_1, the 2^<nd> harmonic amplitude ratio normalized by the incident wave amplitude, greater than 0.4% with a resolution of 0.1%.
2) In immersion measurement, a transmission technique has been developed, which exclude the acoustic nonlinearity of the coupling water. This is very effective for scanning to identify the locations of weak bonds.
3) With the 2^<nd> harmonic of the leaky Rayleigh wave, depth of a dosed fatigue crack is evaluated for depth range of 1-2mm. This is particularly useful for sizing of initial fatigue cracks depth in pressure vessels.
4) FEM codes for nonlinear wave propagation is developed to simulate crack surface clapping and rubbing with introducing special contact elements. With this simulation, we understand quantitative nature of harmonic generation.
5) A patent on evaluation method and apparatus for bond interface evaluation is going to be submitted.
6) This project is interested in some material makers, and two joint projects of nonlinear ultrasonic measurement are currently running. Less

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] K.Kawashima, R.Omote, T.Ito, H.FuJita, T.Shima: "Nonlinear acoustic response through minute cracks : FEM simulation and experimentation"Ultrasonics. 40. 611-615 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Kawashima, J.Okada, N.Nishimura: "Internal microcrack detection with nonlinear ultrasonic waves"Jpn.J.Appl.Phys. 40. 3579-3582 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Kawashima, H.Fujita, T.Shima, T.Okumura, Y.Ohara: "Detection of semi-closed cracks by nonlinear ultrasonics"Proceedings of the 6-th Far-East Conference on Non-Destructive Testing. 201-206 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ohara, K.Kawashima, M.Murase, N.Hirose: "Identification of sintered irons with ultrasonic nonlinearity"Review of Progress in Quantitative Nondestructive Evaluation. 22. 1257-1263 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Kawashima, J.Okada, N.Nishmura: "Internal microcrack detection with nonlinear ultrasonic waves"Jpn.J.Appl.Phys.. 40. 3579-3582 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Kawashima, R.Omote, T.Ito, H.Fujita, T.Shima: "Nonlinear acoustic response through minute cracks : FEM simulation and exprimentation"Ultrasonics. 40. 611-615 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Kawashima, H.Fujita, T.Shima, T.Okumura, Y.Ohara: "Detection of semi-closed cracks by nonlinear ultrasonics"Proceedings of the 6-th Far-East Conference on Non-Destructive Testing. 210-206 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Ohara, K.Kawashima, M.Murase, N.Hirose: "Identification of sintered irons with ultrasonic nonlinearity"Review of Progress in Quantitative Nondestructive Evaluation. 22. 1257-1263 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Kawashima, R.Omote, T.Ito, et al.: "Nonlinear acoustic response through minute surface cracks"Ultrasonics. 40. 611-615 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 奥村毅, 佐藤雅美, 川嶋紘一郎: "漏洩表面波の非線形性を用いた閉口疲労き裂の検出"平成14年度日本機械学会材料力学部門講演会. 519-520 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 奥村毅, 佐藤雅美, 川嶋紘一郎: "漏洩表面波の非線形を用いた閉口疲労き裂の深さ評価"平成14年度日本非破壊検査協会春季講演会. (印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] K. Kawashima, R. Omote, T. Ito, H. Fujita, T. Shima: "Nonlinear acoustic response through minute cracks: FEM simulation and experimentation"Utrasonics. 40/2(in press). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] K. Kawashima, J. Okada, N. Nishimura: "Internal microcrack detection with nonlinear ultrasonic waves"Jpn. J. Appl. Phys. 40/5. 3579-3582 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K. Kawashima, J. Okada, N. Nishimura: "Evalution of spall-damaged layer with nonlinear ultrasonic measurement"Progress in Natural Science. 11. 145-150 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 表竜二, 川嶋紘一郎, 伊藤智啓: "表面斜めき裂を通過するレイリ-波の非線形性"第9回超音波による非破壊評価シンポジウム. 9. 61-62 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Kawashima, et al.: "Evaluation of minute cracks generated by spallation with nonlinear ultrasonic measurement"Proceedings of 8^<th> International Symposium of Modern Acoustics. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 岡田,川嶋,伊藤,西村: "特異要素を用いた有限要素法による微小き裂透過波に現れる2次高調波のシミュレーション"第8回超音波による非破壊評価シンポジウム. 8. 37-42 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] J.Okada,T.Ito,K,Kawashima,N.Nishimura: "Finite element simulation of nonlinear acoustic behavior at minute cracks "Japanese Journal of Applied Physics. 41(in press). (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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