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Defect Identification by the Active and Passive Electric Potential CT (Computer Tomography) Methods Using Spatial Electromagnetic Field Measurements

Research Project

Project/Area Number 13555027
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 InstitutionOsaka University

Principal Investigator

KUBO Shiro  Osaka University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (20107139)

Co-Investigator(Kenkyū-buntansha) IOKA Seiji  Osaka University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (50283726)
SAKAGAMI Takehide  Osaka University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (50192589)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2003: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2002: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2001: ¥6,800,000 (Direct Cost: ¥6,800,000)
KeywordsInverse Problem / Electric Potential Method / Nondestructive Evaluation / Composite Materials / Crack Identification / Delamination / Smart Material / Fracture Mechanics
Research Abstract

The present study deals with the development of the active and passive electric potential CT (computed tomography) methods for the identification of cracks and defects from electromagnetic field measurements based on the inverse analyses. The major results obtained are summarized as follows.
1.The applicability of the passive electric potential CT method to the identification of a through-thickness crack in a plate specimen was examined numerically and experimentally. In the presence of the crack the electric potential distribution of a piezoelectric film glued on the surface of the specimen showed characteristic two peaks. It was found that the crack can be identified from the characteristic parameters of the two peaks based on the proposed inverse analysis scheme. The method was successfully extended to the identification of an inclined crack by using a ratio of the two peaks. It was found that the crack numbers can be estimated by applying the AIC (Akaike information criterion) even when two cracks are closely located.
2.Identification of a three-dimensional surface crack breaking on the back surface by the passive electric potential CT method was examined. A characteristic potential distribution was found on the piezoelectric film which can be used for the three-dimensional crack identification.
3.The passive electric potential method was applied to the identification of of delamination in composite laminates. It was found that the interlaminar defect can be identified from the electric potential distribution on the piezoelectric film when the composites are loaded under three-point bending.
From these results the passive electric potential CT method was found applicable for quantitative identification of two-and three-dimensional cracks and defects.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (40 results)

All Other

All Publications (40 results)

  • [Publications] Shiro KUBO: "Identification of Delamination in Layered Composite Materials by the Electric Potential CT Method"Int.J.Applied Electromagnetics and Mechanics. 15・1-4. 261-267 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shiro KUBO: "Alternating Boundary Element Inversion Scheme-for Solving Inverse Boundary Value Problem from Noisy Data and Its Regularization"Inverse Problems in Engineering Mechanics III, Elsevier. 77-86 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 久保司郎: "逆問題"計算力学と社会,養賢堂. 74-80 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 塩沢大輝: "ピエゾ材料を用いた受動型電気ポテンシャルCT法によるき裂同定に関する実験的検討"材料. 51・8. 926-931 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 塩沢大輝: "受動型電気ポテンシャルCT法による裏面3次元き裂の同定に関する実験的検討"日本機械学会講演論文集. No.024-1. 2-39-2-40 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shiro KUBO: "Estimation of Unknown Boundary Values from Inner Displacement and Strain Measurements and Regularization Using Rank Reduction Method"Inverse Problems in Engineering Mechanics IV, Elsevier. 75-83 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 久保司郎: "能動型および受動型電気ポテンシャルCT法によるき裂同定"日本AEM学会誌. 11-2. 73-81 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA: "An Experimental Study on Applicability of Passive Electric Potential CT Method to Crack Identification"Proc.of Int.Conf.on Advanced Technology in Experimental Mechanics 2003. Paper OS09W0285. 1-6 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA: "Identification of Delamination Defect in Laminated Composites by Passive Electric Potential CT Method"Inverse Problems in Engineering Mechanics IV, Elsevier. 195-203 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 塩沢大輝: "受動型電気ポテンシャルCT法による斜めき裂の同定"日本材料学会第11回破壊力学シンポジウム講演論文集. 75-80 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 高木正彰: "受動型電気ポテンシャルCT法による二次元貫通斜めき裂の同定に関する実験的検討"日本機械学会M&M2003材料力学部門講演会講演論文集. No.03-11. 1041-1042 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA: "Passive Electric Potential CT Method Using Piezoelectric Material for Crack Identification"Inverse Problems in Science and Engineering. 12・1. 71-79 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 塩沢大輝: "受動型電気ポテンシャルCT法による複数き裂の同定"第53回理論応用力学講演会講演論文集. 299-300 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shiro KUBO, Manabu KUCHINISHI, Takahide SAKAGAMI, Seiji IOKA: "Identification of Delamination in Layered Composite Materials by the Electric Potential CT Method"Int. J. Applied Electromagnetics and Mechanics. Vol.15, Nos. 1-4. 261-267 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shiro KUBO, Akira FURUKAWA, Seiji IOKA: "Alternating Boundary Element Inversion Scheme for solving Inverse Boundary Value Problem from Noisy Data and Its Regularization"Inverse Problems in Engineering Mechanics III (Elsevier). 77-86 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA, Shiro KUBO, Takahide SAKAGAMI, Kosuke OKUNO: ""???"材料"J.Soc.Materials Sci.. Vol.51, No.8. 926-931 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA, Shiro KUBO, Takahide SAKAGAMI, Kosuke OKUNO: "An Experimental Study on Applicability of Passive Electric Potential CT Method to Identification of Back Surface Three-Dimensional Crack"Preprint of Japan Soc. Mech. Engrs.. No.024-1. 2-39-2-40 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shiro KUBO, Hirokazu NAMBU: "Estimation of Unknown Boundary Values from Inner Displacement and Strain Measurements and Regularization Using Rank Reduction Method"Inverse Problems in Engineering Mechanics (Elsevier). IV. 75-83 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shiro KUBO, Takahide SAKAGAMI, Daiki SHIOZAWA: "Crack Identification by Active and Passive Electric Potential CT Methods"J.Japan Soc. of Applied Electromagnetics and Mechanics. Vol.11, No.2. 73-81 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA, Shiro KUBO, Takahide SAKAGAMI: "An Experimental Study on Applicability of Passive Electric Potential CT Method to Crack Identification"Proc. of Int. Conf. on Advanced Technology in Experimental Mechanics 2003. Paper #OS09W0285. 1-6 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA, Shiro KUBO, Takahide SAKAGAMI: "Identification of Delamination Defect in Laminated Composites by Passive Electric Potential CT Method"Inverse Problems in Engineering Mechanics IV (Elsevier). 195-203 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA, Shiro KUBO, Takahide SAKAGAMI, Masaaki TAKAGI: "Identification of an Inclined Crack by the Passive Electric Potential CT Method"Proc. of the 11th Symp. on Fracture and Fracture Mechanics, Soc. materials Sci. (Japan). 75-80 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masaaki TAKAGI, Daiki SHIOZAWA, Shiro KUBO, Takahide SAKAGAMI: "An Experimental Study on Identification of Two-Dimensional Through Inclined Crack by Passive Electric Potential CT Method"Proc. of the 2003 Annual Meeting of the JSME Materials and Mechanics Division. No.03-11. 1041-1042 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA, Shiro KUBO, Takahide SAKAGAMI: "Passive Electric Potential CT Method Using Piezoelectric material for Crack Identification"Inverse Problems in Science and Engineering. Vol.12, No.1. 71-79 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Daiki SHIOZAWA, Masaaki, TAKAGI, Shiro KUBO, Takahide SAKAGAMI: "Identification of Multiple Cracks by Passive Electric Potential CT Method"Proc. 53rd National Congress on Theoretical and Applied Mechanics. 299-300 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Shiro KUBO: "Inverse Problems (Yokendo)"Computational Mechanics and Society. 74-80 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 久保司郎: "能動型および受動型電気ポテンシャルCT法によるき裂同定"日本AEM学会誌. 11-2. 73-81 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Daiki SHIOZAWA: "An Experimental study on Applicability of Passive Electric Potential CT Method to Crack Identification"Proc.of Int.Conf.on Advanced Technology in Experimental mechanics 2003. Paper OS09W0 285. 1-6 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Daiki SHIOZAWA: "Identification of Delamination Defect in Laminated Composites by Passive Electric Potential CT Method"Inverse Problems in Engineering Mechanics IV, Elsevier. 195-203 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 塩沢大輝: "受動型電気ポテンシャルCT法による斜めき裂の同定"日本材料学会第11回破壊力学シンポジウム講演論文集. 75-80 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 高木正彰: "受動型電気ポテンシャルCT法による二次元貫通斜めき裂の同定に関する実験的検討"日本機械学会M&M2003材料力学部門講演会講演論文集. No.03-11. 1041-1042 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 塩沢大輝: "受動型電気ポテンシャルCT法による複数き裂の同定"第53回理論応用力学講演会講演論文集. 299-300 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 塩澤 大輝: "複合材料におけるはく離欠陥同定に対する受動型電気ポテンシャルCT法の適用性に関する数値的検討"日本材料学会第51期通常総会学術講演会講演論文集. 43-44 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 塩澤 大輝: "ピエゾ材料を用いた受動型電気ポテンシャルCT法"日本機械学会M&Mレークサイドサマーシンポジウム講演論文集. No.02-21. 97-100 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 塩澤 大輝: "受動型電気ポテンシャルCT計測による複合材はく離欠陥の同定に関する数値的検討"第46回日本学術会議材料研究連合講演会講演前刷集. 299-300 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] "受動型電気ポテンシャルCT法による三次元表面き裂の同定に関する実験的検討"日本機械学会平成14年度材料力学部門講演会講演論文集. No.02-05. 497-498 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] "複合材料におけるはく離欠陥導出に対する受動型電気ポテンシャルCT法の適用性に関する検討"日本機械学会平成14年度材料力学部門講演会講演論文集. No.02-05. 357-358 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 塩澤 大輝: "ピエゾ材料を用いた受動型電気ポテンシャルCT法による複合材内はく離状欠陥の同定"日本機械学会第15回計算力学講演会講演論文集. No.02-02. 411-412 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Daiki SHIOZAWA: "Crack Identification by Electric Potential CT Measurement Using Piezoelectric Film Installed in Structural Member"Proc. of 1st Taiwan-Japan Workshop on Mechanical and Aerospace Engineering. Vol.1. 207-215 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 塩澤 大輝: "受動型電気ポテンシャルCT法による裏面3次元き裂の同定に関する実験的検討"日本機械学会関西支部第77期定時総会講演会講演論文集. No.024-1(掲載予定). (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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