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2017 Fiscal Year Final Research Report

Development of nonlinear ultrasonic phased array imaging with surface acoustic wave and thermal stress

Research Project

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Project/Area Number 15H04139
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionTohoku University

Principal Investigator

Ohara Yoshikazu  東北大学, 工学研究科, 准教授 (90520875)

Co-Investigator(Kenkyū-buntansha) 三原 毅  東北大学, 工学(系)研究科(研究院), 教授 (20174112)
辻 俊宏  東北大学, 工学研究科, 助教 (70374965)
山中 一司  東北大学, 未来科学技術共同研究センター, 教授 (00292227)
Project Period (FY) 2015-04-01 – 2018-03-31
Keywords非破壊検査 / 閉じたき裂 / フェーズドアレイ / 表面波 / 熱応力
Outline of Final Research Achievements

Accurate measurement of surface crack is very important to ensure the safety and reliability of strategic structures because surface is one of defects-prone areas. However, conventional ultrasonic method may cause underestimation or overlook, since some of them are closed. In this study, we proposed and developed a novel imaging method, nonlinear ultrasonic phased array imaging with surface acoustic wave and thermal stress. It was demonstrated that our proposed technique is very useful in improving the sensitivity of detection of closed surface cracks and in achieving high measurement accuracy of crack length.

Free Research Field

非破壊評価

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Published: 2019-03-29  

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