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Defect inspection method based on Cauchy's integral theorem using a circular differential coherent illumination

Research Project

Project/Area Number 18K04172
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 21030:Measurement engineering-related
Research InstitutionSaga University

Principal Investigator

KENBU TERAMOTO  佐賀大学, 理工学部, 教授 (70207489)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords超音波撮像 / 点波源拘束偏微分方程式 / 波動情報処理 / 非破壊検査 / 異方性弾性体 / ガイド波 / 超音波試験 / ダイバージェンス / CFRP / 超音波計測 / コーシーの積分定理 / 光音響計測
Outline of Final Research Achievements

Guided elastic waves are used for the non-destructive evaluation of plate-like structures. In recent years, manufacturing based on composites has increased gradually. However, the elastic wave dynamics in such materials is considerably more complicated. The conventional time-of-flight technique is not reliable for locating the defects even in isotropic plates because of the dispersiveness in the Lamb wave propagation. Avoiding difficulties caused by the dispersiveness, this paper proposes a novel imaging method based on the point-source constrained partial differential equation in order to reconstruct the silhouette image of the subsurface defects. A theoretical analysis of the proposed method is developed for single point-like defect in the isotropic plate. Numerical evaluation and several experimental results are presented to verify the image reconstruction process of the subsurface defects in the CFRP plates.

Academic Significance and Societal Importance of the Research Achievements

近年, 複合薄板材料が様々な構造物において利用されている.その中でも炭素繊維強化樹脂薄板は軽量化と強度が求められる部材に多く使用されつつある. 多層繊維強化複合材では枚数や配向の違いによって弾性率(テンソル量)が変化するため, 均質な等方性弾性体の場合と比較して精密な欠損像の再構成が困難であった. 本研究は, 点波源拘束偏微分方程式を用いることにより, 超音波非破壊検査とは全く異なる原理にもとづき,波長や音速に左右されずに板材中の欠損位置を特定できる画期的な方法である.

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (21 results)

All 2021 2020 2019 2018 Other

All Journal Article (10 results) (of which Peer Reviewed: 8 results) Presentation (9 results) (of which Int'l Joint Research: 4 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Inspection of subsurface defects in the composite materials by divergence-based analysis2020

    • Author(s)
      Kenbu Teramoto, Haruka Ishibashi
    • Journal Title

      Proc. of SICE2020

      Volume: - Pages: 200-203

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Inspection of subsurface defects in CFRP-plate with using point-source constrained partial differential equation2020

    • Author(s)
      Kenbu Teramoto, Haruka Ishibashi, Taku Mihara
    • Journal Title

      Proc. of 2020 IEEE International Ultrasonics Symposium (IUS)

      Volume: - Pages: 1-4

    • DOI

      10.1109/ius46767.2020.9251817

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 位相速度ベクトル場のダイバージェンスに基づく等方性板材の非破壊検査2020

    • Author(s)
      石橋春香, 寺本 顕武
    • Journal Title

      超音波テクノ

      Volume: vol.5,6 Pages: 38-41

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A0モードラム波動場の点波源拘束偏微分方程式にもとづく欠損のシルエット像再構成2020

    • Author(s)
      石橋春香, 寺本 顕武
    • Journal Title

      計測自動制御学会論文集

      Volume: 56 Pages: 217-226

    • NAID

      130007830922

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 点波源拘束偏微分方程式にもとづく 板材の非破壊検査2020

    • Author(s)
      寺本 顕武, 石橋 春香
    • Journal Title

      第27回超音波による非破壊評価シンポジウム講演論文集

      Volume: 1 Pages: 81-86

    • Related Report
      2019 Research-status Report
  • [Journal Article] Inspection of subsurface defects in the composite materials by divergence-based analysis over the phase velocity vector field2019

    • Author(s)
      Kenbu Teramoto, Haruka Ishibashi
    • Journal Title

      Proceedings of IUS2019

      Volume: 1 Pages: 14-15

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Divergence based analysis for detecting subsurface defect in the plate like structure2019

    • Author(s)
      Kenbu Teramoto, Haruka Ishubashi
    • Journal Title

      Proceedings of the SICE Annual Conference 2019

      Volume: 1 Pages: 1179-1182

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] 点波源拘束微分方程式に基づく直交異方性弾性体の非破壊検査2019

    • Author(s)
      寺本 顕武, 石橋 春香
    • Journal Title

      第36 回センシングフォーラム予稿集

      Volume: 1 Pages: 41-47

    • Related Report
      2019 Research-status Report
  • [Journal Article] Dynamic Shear Strain Analysis for Reconstructing Silhouette of Subsurface Defects in the Orthotropic Materials2018

    • Author(s)
      K.Teramoto, H. Ishibashi
    • Journal Title

      Proc. of the 6th Japna-US NDT symposium

      Volume: 1 Pages: 1-8

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dynamic shear strain analysis for reconstructing divergence of the phase velocity vector field2018

    • Author(s)
      K.Teramoto, H.Ishibashi
    • Journal Title

      Proc. of SICE 2018

      Volume: 1 Pages: 1332-1337

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Lp 空間によるラム波の伝搬近似2021

    • Author(s)
      寺本 顕武
    • Organizer
      第 28 回 超音波による非破壊評価シンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] Inspection of subsurface defects in the composite materials by divergence-based analysis2020

    • Author(s)
      K.Teramoto
    • Organizer
      SICE2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Inspection of subsurface defects in CFRP-plate with using point-source constrained partial differential equation2020

    • Author(s)
      K.Teramoto
    • Organizer
      IEEE International Ultrasonic Symposium 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Lp空間での波動伝搬とグリーン関数2020

    • Author(s)
      寺本 顕武
    • Organizer
      第37回センシングフォーラム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 点波源拘束偏微分方程式にもとづく 板材の非破壊検査2020

    • Author(s)
      寺本 顕武
    • Organizer
      第27回超音波による非破壊評価シンポジウム
    • Related Report
      2019 Research-status Report
  • [Presentation] Inspection of subsurface defects in the composite materials by divergence-based analysis over the phase velocity vector field2019

    • Author(s)
      Haruka Ishibashi
    • Organizer
      IEEE IUS2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Divergence based analysis for detecting subsurface defect in the plate like structure2019

    • Author(s)
      Kenbu Teramoto
    • Organizer
      SICE Annual Conference 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 点波源拘束微分方程式に基づく直交異方性弾性体の非破壊検査2019

    • Author(s)
      寺本 顕武
    • Organizer
      第36 回センシングフォーラム
    • Related Report
      2019 Research-status Report
  • [Presentation] 位相速度ベクトル場のダイバージェンスにもとづく非破壊検査2018

    • Author(s)
      石橋春香
    • Organizer
      第35回センシングフォーラム
    • Related Report
      2018 Research-status Report
  • [Book] 計測のための統計2018

    • Author(s)
      寺本 顕武, 椿 広計
    • Total Pages
      277
    • Publisher
      コロナ社
    • ISBN
      4339033545
    • Related Report
      2018 Research-status Report
  • [Remarks] ようこそ センシングの世界へ

    • URL

      https://sites.google.com/terremotolab.net/terremotolab/

    • Related Report
      2019 Research-status Report

URL: 

Published: 2018-04-23   Modified: 2022-01-27  

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