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Development of ultrasonic knowledge base for evaluation of interface damage

Research Project

Project/Area Number 03555104
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 土木構造
Research InstitutionTokai University

Principal Investigator

KITAHARA Michihiro  Tokai University School of Marine Science and Technology Associate Professor, 海洋学部, 助教授 (60135522)

Co-Investigator(Kenkyū-buntansha) NOTAKE Masayoshi  Mitsubishi Research Institute, Mathematical Engineering Dept., Manager, 数理工学部, 室長
SUZUKI Hideo  Ono Sokki, Acoustics Laboratory, Manager, 音響技術研究所, 部長
HAMADA Masanori  Tokai University School of Marine Science and Technology Professor, 海洋学部, 教授 (30164916)
SAKODA Shigemi  Tokai University School of Marine Science and Technology Associate Professor, 海洋学部, 助教授 (50056230)
Project Period (FY) 1991 – 1992
Project Status Completed (Fiscal Year 1992)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 1992: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1991: ¥2,900,000 (Direct Cost: ¥2,900,000)
KeywordsInterface / Ultrasonics / Damage evaluation / Knowledge base / 波動知識ベ-ス
Research Abstract

An ultrasonic knowledge base has been developed for the evaluation of interface defects of structural materials. The knowledge base is based on elastodynamic theory and experimental measurement. A system to e valuate an interface defect has also been proposed. The following is the summary of results in each phase of the research.
1. Knowledge base from elastodynamic theory
(1) Introduction of the spring model is a versatile way to represent the various situations of interface conditions.
(2) To evaluate the elastodynamic far-fields, it is important to introduce the following two steps:
a) evaluation of near-fields by using the full space Green's function and
b) evaluation of far-fields by using the Green's function which satisfies the interface condition.
(3) Back-scattered wave fields from interface defects have been calculated in some configurations of pulse-echo and pitch-catch methods of ultrasonics.
2. Knowledge base from experiment
Complemental back-scattered wave fields have been accumulated from experimental measurements.
3. Development of evaluation system
A neural network system to evaluate a defect has been proposed by utilizing the knowledge base developed in the phases of 1. and 2.

Report

(3 results)
  • 1992 Annual Research Report   Final Research Report Summary
  • 1991 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] KITAHARA、M.: "Transient elastodynamic analysis for three-dimensional configurations" Developments in Boundary Element Methods (Eds.P.K.Banerjee and S.Kobayasyi、Elsevier). 7. 253-281 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] HIROSE,S.: "Ultrasonic scattering analysis to characterize nonlinear behavior of material interfaces" Nondestructive Testing and Evaluation. 8-9. 405-416 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] KITAHARA,M.: "Neural network for crack-depth determination from ultrasonic backscattering data" Review of Progress in Quantitative Nondestructive Evaluation. 11. 701-708 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] KITAHARA,M.: "Boundary element methods for multi-defects characterizations" Theory and Applications of Boundary Element Methods (Eds.Q.Du and M.Tanaka,Int.Academic Pub.). 215-222 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] HIROSE,S.: "Scattering of elastic waves by interface cracks between dissimilar materials" Review of Progress in Quantitative Nondestructive Evaluation. 12. (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] KITAHARA,M.: "Boundary element-node condensed finite element method for three dimensional elastic wave propagation problems" Boundary Element Methods (Eds.S.Kodayashi and N.Nisimura,Springer). 194-201 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kitahara, M.: "Transient elastodynamic analysis for three-dimensional configurations" Developments in Boundary Element Methods. Vol.7, Elsevier. 253-281 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hirose, S.: "Ultrasonic scattering analysis to characterize nonlinear behavior of material interfaces" Nondestructive Testing and Evaluation. Vol.8-9. 405-416 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kitahara, M.: "Neural network for crack-depth determination from ultrasonic backscattering data" Review of Progress in Quantitative Nondestructive Evaluation. Vol.11. 701-708 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kitahara, M.: "Boundary element methods for multi-defects characterizations" Theory and Applications of Boundary Element Methods. Int. Academic Pub.215-222 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Hirose, S.: "Scattering of elastic waves by interface cracks between dissimilar materials" Review of Progress in Quantitative Nondestructive Evaluation. Vol.12. (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] Kitahara, M.: "Boundary element-node condensed finite element method for three dimensional elastic wave propagation problems" Boundary Element Methods. Springer. 194-201 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1992 Final Research Report Summary
  • [Publications] M.Kitahara(他1名): "BIE analysis of elastic wave scattering by a nonlinear interface" Review of Progress in Quantitative Nondestructive Evaluation. 11. 33-40 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Kitahara(他1名): "Ultrasonic scattering analysis to characterize nonlinear behavior of material interfaces" Nondestructive Testing and Evaluation. 8-9. 405-416 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Kitahara(他2名): "Transient elastodynamic analysis for three-dimensional configurations" Developments in Boundary Element Methods. 7. 253-281 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Kitahara M.Notake(他4名): "Neural network for crack-depth determination from ultrasonic backscattering data" Review of Progress in Quantitative Nondestructive Evaluation. 11. 701-708 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] M.Kitahara(他1名): "Scattering of elastic waves by interface cracks between dissimilar materials" Review of Progress in Quantitative Nondestructive Evaluation. 12. (1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] Kitahara,M.: "Boundary element methods fof multi-defects characterizations" Theory and Applications of Boundary Element Methods (International Academic Publishers). 215-222 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Hirose,S.: "Scattering of elastic waves by a crack with spring-mass contact" International Journal for Numerical Methods in Engineering. 31. 789-801 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Ogi,T.: "Application of neural network to classification of defects: basic study of weights" Review of Progress in Quantitative Nondestructive Evaluation (Plenum Press). 10A. 683-688 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 武捨 貴昭: "超音波フィルタリング処理による多層構造部材の界面評価" 土木工学における非破壊評価シンポジウム講演論文集(土木学会構造工学委員会). 25-30 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] Kitahara,M.: "Transient elastodynamic analysis for three dimensional configulations" Developments in Boundary Element Methods (Elsevier Applied Science). 7. (1992)

    • Related Report
      1991 Annual Research Report

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Published: 1991-04-01   Modified: 2016-04-21  

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