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

2017 Fiscal Year Final Research Report

• 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
• 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

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.

Free Research Field

機械材料・材料力学