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1992 Fiscal Year Final Research Report Summary

Acoustoelastic Spectrum Method for Nondestructive Residual Stress Measurements

Research Project

Project/Area Number 03650091
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 材料力学
Research InstitutionRitsumeikan University

Principal Investigator

IWASHIMIZU Yukio  Ritsumeikan University, Faculty of Science and Engineering, Professor, 理工学部, 教授 (70026152)

Project Period (FY) 1991 – 1992
KeywordsAcoustoelasticity / Ultrasonic Stress Analysis / Residual Stress / Nondestructive Measurement / Polarization Directions / Ultrasonic Spectrum Analysis / Amplitude Spectrum / Phase Spectrum
Research Abstract

The spectrum method for acoustoelastic stress analysis was studied experimentally. In main experiments, this method was applied to analyze plane stress distributions in two notched aluminum specimens. In the measurement, ultrasonic transverse waves were sent in the thickness direction, and their echoes were analyzed by FFT. First, the amplitude spectrum was used to determine the difference of two transverse velocities, and polarization directions. Since the orthogonality of polarization directions thus determined was not so satisfactory in the stressed state as in the stress-free state, the use of averaged orthogonal directions was shown necessary in this stress analysis. Applying these results to the acoustoelastic law of slightly orthotropic materials, the normal stress difference and shear stress were obtained, and each normal stress was subsequently determined by the shear difference method. Secondly, the normal stress difference was determined from the phase spectrum, and this new approach was confirmed very significant for further development of the spectrum method. Finally the availability of a small size transducer in the spectrum method was also confirmed. Though the stresses treated in these experiments were not residual ones, the obtained results are useful for nondestructive mesurements of residual stresses. For residual stress analysis, another experiments were carried out by using weld, and shrink-fit specimens of steel, and it was confirmed that the shear stress and normal stress difference were nondestructively determined by the spectrum method.

  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 岩清水 幸夫,石田 稔郎: "超音波スペクトラム解析による切欠き応力分布の測定" 日本機械学会講演論文集NO.910-62. A. 209-211 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Y.HIRAMATSU,Y.IWASHIMIZU: "Ultrasonic residual stress measurement in welded plates." Residual Stresses- (edited by H.Fujiwara etal.)Elsevier. 304-309 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩清水 幸夫,石田 稔郎: "超音波スペクトラム解析による応力測定について" 日本機械学会講演老文集NO.924-1. 31-33 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小堀 修身,脇坂 匡,岩清水 幸夫: "超音波による焼きばめ応力の測定" 日本機械学会講演論文集NO.924-1. 34-36 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩清水 幸夫,福永 馨: "音弾性スペクトラム解析による応力測定" 日本非破壊検査境界音弾性研究会講演論文集NO.10. 58-63 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩清水 幸夫(分担執筆): "応力・歪測定技術(監修河田幸三)第2章,第13節音弾性法" 総合技術センター,

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Yukio Iwashimizu, and Toshiro Ishida: ""Measurement of notch stress distribution by ultrasonic spectrum analysis" in Japanese" The Japan Society for Mechanical Engineers, Pre-print. No.910-62 A. 209-211 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yoshiyuki Hiramatsu, and Yukio Iwashimizu: ""Ultrasonic residual stress measurement in welded plates"" Residual Stresses - III, edited by H.Fujiiwara et al., Elsevier. 304-309 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yukio Iwashimizu, and Toshiro Ishida: ""Stress measurement by ultrasonic spectrum analysis" in Japanese" The Japan Society for Mechanical Engineers, Pre-print. No.924-1. 31-33 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Osami Kobori, Masashi Wakisaka, and Yukio Iwashimizu: ""Ultrasonic measurement of shrink-fit stresses" in Japanese" The Japan Society for Mechanical Engineers, Pre-print. No.924-1. 34-36 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yukio Iwashimizu, and Kaoru Fukunaga: ""Stress measurement by acoustoelastic spectrum analysis" in Japanese" The Japanese Society for Non-destructive Inspection, Acoustoelasticity Research Report. No.10. 58-63 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Yukio Iwashimizu: ""Recent techniques for stress and strain measurements", edited by Kozo Kawata, in Japanese" Sogo-gijyutsu center, Chapter 2, Section 13 Acoustoelasticity. 303-331 (1992)

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

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Published: 1994-03-24  

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