Defect Identification by Time-Space Active Pulse-Echo and Passive Electric Potential Methods Using Piezoelectric Material

• Project/Area Number: 15H03897
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Materials/Mechanics of materials
• Research Institution: Setsunan University
• Principal Investigator: Kubo Shiro 摂南大学, 理工学部, 教授 (20107139)
• Co-Investigator(Kenkyū-buntansha): 阪上 隆英 神戸大学, 工学研究科, 教授 (50192589) ; 井岡 誠司 大阪電気通信大学, 工学部, 教授 (50283726)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Project Status: Completed (Fiscal Year 2017)
• Budget Amount: ¥10,660,000 (Direct Cost: ¥8,200,000、Indirect Cost: ¥2,460,000); Fiscal Year 2017: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000); Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000); Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
• Keywords: 機械材料・材料力学 / 非破壊検査 / 破壊力学 / 欠陥同定 / 逆問題 / 逆解析 / ピエゾフィルム / 非破壊評価 / き裂同定 / 逆問題解析 / 構造・機能材料 / 構造物健全性評価

Outline of Final Research Achievements

Crack identification by the passive electric potential (computed tomography) method was made using electric potential on piezoelectric film pasted on surface of a body to be inspected. Use of the piezoelectric film on several surfaces was effective. Function expansion of residual between calculated and observed potentials and use of characteristics of potential distribution worked well for rapid identification. Crack identification was made by the active pulse-echo method, in which supersonic wave was activated by applying electric pulse on the film and receiving signal reflected on the crack. By applying time reversal method location of crack tip was estimated. Use of piezoelectric film on several surfaces was effective.

Research Products

• [Journal Article] 能動的パルスエコー法に対する時間反転法による欠陥同定： プローブ個数の影響 (2018)
  • Author(s): 中村誠剛，久保司郎
  • Journal Title: 日本機械学会関西支部第93期定時総会講演会講演論文集 Volume: No.184-1 Pages: 49-51
  • NAID: 130007486182
• [Journal Article] Active Pulse Echo Method with Time Reversal Method for Identifying Crack (2017)
  • Author(s): Shiro Kubo, Seigo Nakamura
  • Journal Title: Proceedings of the 9th Int. Conf. on Inverse Problems in Engineering Volume: なし Pages: 1-8
  • Peer Reviewed
• [Journal Article] 能動型パルスエコー法に対する時間反転法によるき裂同定： プローブ配置の影響 (2017)
  • Author(s): 中村誠剛，久保司郎
  • Journal Title: 日本機械学会第30回計算力学講演会講演論文集 Volume: No.17-4 Pages: 1-3
• [Journal Article] 能動型パルスエコー法に対する時間反転法によるき裂同定： 実験的検証 (2017)
  • Author(s): 中村誠剛，久保司郎
  • Journal Title: 日本機械学会 M&M2017 材料力学カンファレンスCD-ROM論文集 Volume: No.17-5 Pages: 157-161
• [Journal Article] 逆問題の考え方 (2016)
  • Author(s): 久保司郎
  • Journal Title: 摂南大学融合科学研究所論文集 Volume: 2 Pages: 121-128
  • NAID: 120006010067
  • Peer Reviewed / Open Access
• [Journal Article] Defect Identification by the Passive Electric Potential CT Method Using Several Piezoelectric Films (2016)
  • Author(s): Defect Identification by the Passive Electric Potential CT Method Using Several Piezoelectric Films
  • Journal Title: Proc. the 17th International Conference on Experimental Mechanics, Rhodes Volume: なし Pages: 1-2
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Time Reversal Method for Crack Identification by the Active Pulse Echo Method and the Effect of Probe Spacing (2016)
  • Author(s): Shiro Kubo and Kotaro Murakami
  • Journal Title: Proc. of the 10th Asia-Pacific Conference on Fracture and Strength, Toyama Volume: なし Pages: 201-202
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] 破壊力学 (2015)
  • Author(s): 久保司郎
  • Journal Title: 摂南大学融合科学研究所論文集 Volume: 1 Pages: 91-98
  • Peer Reviewed
• [Presentation] Active Pulse Echo Method with Time Reversal Method for Identifying Crack (2017)
  • Author(s): Shiro Kubo
  • Organizer: The 9th Int. Conf. on Inverse Problems in Engineering, Waterloo
  • Place of Presentation: Waterloo University, Canada
  • Year and Date: 2017-05-23
  • Int'l Joint Research
• [Presentation] 逆問題解析と非破壊評価への応用 (2017)
  • Author(s): 久保司郎
  • Organizer: 日本非破壊検査協会 安全・安心な社会を築く先進材料・非破壊計測技術シンポジウム
  • Place of Presentation: 函館、サン・リフレ函館
  • Year and Date: 2017-03-13
  • Invited
• [Presentation] ピエゾフィルムを用いた受動型・能動型き裂同定・モニタリング手法ピエゾフィルムを用いた受動型・能動型き裂同定・モニタリング手法 (2017)
  • Author(s): 久保司郎
  • Organizer: 2017年度 精密工学会 関西地方定期学術講演会
  • Invited
• [Presentation] Crack Identification Using Piezoelectric Film -From Passive Method to Active Method- (2017)
  • Author(s): Shiro Kubo
  • Organizer: Taiwan-Japan Joint Workshop on Inverse Problems in Kanazawa 2017
  • Int'l Joint Research / Invited
• [Presentation] 逆問題の考え方 (2017)
  • Author(s): 久保司郎
  • Organizer: 摂南大学融合科学研究所 研究発表会
  • Invited
• [Presentation] Defect Identification by the Passive Electric Potential CT Method Using Several Piezoelectric Films (2016)
  • Author(s): Shiro Kubo
  • Organizer: The 17th International Conference on Experimental Mechanics
  • Place of Presentation: Rhodes, Greece
  • Year and Date: 2016-07-03
  • Int'l Joint Research
• [Presentation] コーティングを有する薄肉パイプ外面からの内部温度と熱応力の分布の逆解析 (2015)
  • Author(s): 久保司郎
  • Organizer: 日本機械学会 M&M2015 材料力学カンファレンス
  • Place of Presentation: 慶応大学（横浜市港北区）
  • Year and Date: 2015-11-21