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Novel Ultrasonic Nondestructive Evaluation Technologies for Sustainable Society

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We are currently working on developing novel ultrasonic measurement technologies and applying them to nondestructive evaluation (NDE) and materials characterization to ensure the safety and reliability of aging structures, manufactured products, and newly developed materials. Our internationally collaborative research network's strongness is our diverse backgrounds such as materials science and engineering, mechanical engineering, civil engineering, geophysics, acoustics, and bioengineering. We aim at realizing a sustainable society by making various breakthroughs beyond present ultrasonic measurement technologies through our close connection and strong interaction.

Publications

1 Yoshikazu Ohara, Taisei Umezaki, Ewen Carcreff, Sylvain Haupert, Toshihiro Tsuji, Tsuyoshi Mihara, “Experimental Analysis of Linear and Nonlinear Ultrasonic Scatterings at Closed Fatigue Crack Using Fixed-Voltage Fundamental Wave Amplitude Difference with Radarlike Display”, Japanese Journal of Applied Physics, 60, SDDB01-1-8 (2021).
2 Yoshikazu Ohara, Marcel C. Remillieux, Tomomi Onuma, Kosuke Tsunoda, Toshihiro Tsuji, Tsuyoshi Mihara, “Toward an ultra-high resolution phased-array system for 3D ultrasonic imaging of solids”, Applied Physics Letters, 117, 111902-1-5 (2020).
3 Yoshikazu Ohara, Hiromichi Nakajima, Sylvain Haupert, Toshihiro Tsuji, Tsuyoshi Mihara, “Imaging of three-dimensional crack open/closed distribution by nonlinear ultrasonic phased array based on fundamental wave amplitude difference”, Japanese Journal of Applied Physics, 59, SKKB01-1-9 (2020).
4 Marcel Remillieux, Djamel Kaoumi, Yoshikazu Ohara, Marcie Stuber Geesey, Li Xi, Ryan Schoell, Charles Bryan, David Enos, Deborah Summa, T. J. Ulrich, Brian Anderson, Zeev Shayer, “Detecting and imaging stress corrosion cracking in stainless steel, with application to inspecting storage canisters for spent nuclear fuel”, NDT&E International, 109, 102180-1-17 (2020).
5 Yoshikazu Ohara, Hiromichi Nakajima, Toshihiro Tsuji, Tsuyoshi Mihara, “Nonlinear surface-acoustic-wave phased array with fixed-voltage fundamental wave amplitude difference for imaging closed cracks”, NDT&E International, 108, 102170-1-10 (2019).
6 Yoshikazu Ohara, Hiromichi Nakajima, Sylvain Haupert, Toshihiro Tsuji, Tsuyoshi Mihara, “Nonlinear ultrasonic phased array with fixed-voltage fundamental wave amplitude difference for high-selectivity imaging of closed cracks”, The Journal of the Acoustical Society of America, 146(1), 266-277 (2019).
7 Yoshikazu Ohara, Jack Potter, Hiromichi Nakajima, Toshihiro Tsuji, Tsuyoshi Mihara, "Multi-mode nonlinear ultrasonic phased array for imaging closed cracks", Japanese Journal of Applied Physics, 58, SGGB06-1-7 (2019).
8 Sylvain Haupert, Yoshikazu Ohara, Ewen Carcreff, Guillaume Renaud, "Fundamental wave amplitude difference imaging for detection and characterization of embedded cracks", Ultrasonics, 96, 132-139 (2019).
9 Jiang Jin, Jacques Rivière, Yoshikazu Ohara, Parisa Shoukouhi, “Dynamic acousto-elastic response of single fatigue cracks with different microstructural features: an experimental investigation”, Journal of Applied Physics, 124, 075303-1-14 (2018).
10 Yoshikazu Ohara, Koji Takahashi, Yoshihiro Ino, Kazushi Yamanaka, Toshihiro Tsuji, Tsuyoshi Mihara, “High-selectivity imaging of closed cracks in a coarse-grained stainless steel by nonlinear ultrasonic phased array method”, NDT&E International, 91, 139-147 (2017).
11 Yoshikazu Ohara, Taro Oshiumi, Hiromichi Nakajima, Kazushi Yamanaka, Xiaoyang Wu, Tetsuya Uchimoto, Toshiyuki Takagi, Toshihiro Tsuji, Tsuyoshi Mihara, “Ultrasonic phased array with surface acoustic wave for imaging cracks”, AIP Advances, 7 (2017).
12 Yoshikazu Ohara, Brian Anderson, T. J. Ulrich, Pierre-Yves Le Bas, Paul Johnson, Sylvain Haupert, “Localization of closed cracks using multi-mode nonlinear resonant ultrasound spectroscopy”, Journal of the Japanese Society for Non-Destructive Inspection, 64(12), 571-578 (2015). [in Japanese]
13 Azusa Sugawara, Kentaro Jinno, Yoshikazu Ohara, Kazushi Yamanaka, “Closed-crack imaging and scattering behavior analysis using confocal subharmonic phased array”, Japanese Journal of Applied Physics, 54, 07HC08-1-8 (2015).
14 Akihiro Ouchi, Azusa Sugawara, Yoshikazu Ohara, Kazushi Yamanaka: “Subharmonic phased array for crack evaluation using surface acoustic wave”, Japanese Journal of Applied Physics, 54, 07HC05-1-6 (2015).
15 Koji Takahashi, Kentaro Jinno, Yoshikazu Ohara, Kazushi Yamanaka, “Evaluation of crack closure stress by analyses of ultrasonic phased array images during the global preheating and local cooling”, Japanese Journal of Applied Physics, 54, 07HC05-1-6 (2015).
16 Kentaro Jinno, Azusa Sugawara, Yoshikazu Ohara, Kazushi Yamanaka, “Analysis on nonlinear images of vertical closed cracks by damped double node model”, Materials Transactions, 55(7), 1017-1023 (2014).
17 Yoshikazu Ohara, Koji Takahashi, Kentaro Jinno, Kazushi Yamanaka, “High-selectivity ultrasonic imaging of closed cracks using global preheating and local cooling”, Materials Transactions, 55(7), 1003-1010 (2014).
18 Jacques Rivière, Marcel C. Remillieux, Yoshikazu Ohara, Brian Anderson, Sylvain Haupert, T. J. Ulrich, Paul A. Johnson, “Dynamic acousto-elasticity in a fatigue-cracked sample”, Journal of Nondestructive Evaluation, 33, 216-225 (2014).
19 Sylvain Haupert, Jacques Rivière, Brian Anderson, Yoshikazu Ohara, T. J. Ulrich, Paul Johnson, “Optimized dynamic acousto-elasticity applied to fatigue damage and stress corrosion cracking”, Journal of Nondestructive Evaluation, 33, 226-238 (2014).
20 Yoshikazu Ohara, Koji Takahashi, Satoru Murai, Kazushi Yamanaka, “High-selectivity imaging of closed cracks using elastic waves with thermal stress induced by global preheating and local cooling”, Applied Physics Letters, 103, 031917-1-5 (2013).
21 Masako Ikeuchi, Kentaro Jinno, Yoshikazu Ohara, Kazushi Yamanaka, “Improvement of closed crack selectivity in nonlinear ultrasonic imaging using fundamental wave amplitude difference”, Japanese Journal of Applied Physics, 52, 07HC08-1-5 (2013).

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