Imaging of closed cracks using nonlinear response of elastic waves at subharmonic frequency

Yoshikazu Ohara; Tsuyoshi Mihara; Ryouta Sasaki; Toshihiro Ogata; Setsu Yamamoto; Yuuki Kishimoto; Kazushi Yamanaka

doi:10.1063/1.2426891

Imaging of closed cracks using nonlinear response of elastic waves at subharmonic frequency

Yoshikazu Ohara, Tsuyoshi Mihara, Ryouta Sasaki, Toshihiro Ogata, Setsu Yamamoto, Yuuki Kishimoto, Kazushi Yamanaka

ENG - Materials Processing

Research output: Contribution to journal › Article › peer-review

121 Citations (Scopus)

Abstract

The authors constructed a novel apparatus based on subharmonic ultrasound for the accurate imaging of closed cracks. Linear and nonlinear responses not only from the tip but also from other parts of cracks were observed in fundamental and subharmonic images, which were changed with varying closure stress. The subharmonic images always gave an accurate length of partially closed cracks, in contrast to the fundamental images in which the crack length was underestimated. Significant similarities in generation and resonance phenomena of subharmonic waves, acoustic emission, and the vibration of microbubbles are discussed.

Original language	English
Article number	011902
Journal	Applied Physics Letters
Volume	90
Issue number	1
DOIs	https://doi.org/10.1063/1.2426891
Publication status	Published - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.2426891

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title = "Imaging of closed cracks using nonlinear response of elastic waves at subharmonic frequency",

abstract = "The authors constructed a novel apparatus based on subharmonic ultrasound for the accurate imaging of closed cracks. Linear and nonlinear responses not only from the tip but also from other parts of cracks were observed in fundamental and subharmonic images, which were changed with varying closure stress. The subharmonic images always gave an accurate length of partially closed cracks, in contrast to the fundamental images in which the crack length was underestimated. Significant similarities in generation and resonance phenomena of subharmonic waves, acoustic emission, and the vibration of microbubbles are discussed.",

author = "Yoshikazu Ohara and Tsuyoshi Mihara and Ryouta Sasaki and Toshihiro Ogata and Setsu Yamamoto and Yuuki Kishimoto and Kazushi Yamanaka",

note = "Funding Information: This work was supported by Grants-in-Aid for Science Research (Nos. 16206071 and 174727) from the Ministry of Education, Culture, Sports, Science and Technology of Japan, and by Japan Nuclear Energy Safety Organization.",

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volume = "90",

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T1 - Imaging of closed cracks using nonlinear response of elastic waves at subharmonic frequency

AU - Ohara, Yoshikazu

AU - Mihara, Tsuyoshi

AU - Sasaki, Ryouta

AU - Ogata, Toshihiro

AU - Yamamoto, Setsu

AU - Kishimoto, Yuuki

AU - Yamanaka, Kazushi

N1 - Funding Information: This work was supported by Grants-in-Aid for Science Research (Nos. 16206071 and 174727) from the Ministry of Education, Culture, Sports, Science and Technology of Japan, and by Japan Nuclear Energy Safety Organization.

PY - 2007

Y1 - 2007

N2 - The authors constructed a novel apparatus based on subharmonic ultrasound for the accurate imaging of closed cracks. Linear and nonlinear responses not only from the tip but also from other parts of cracks were observed in fundamental and subharmonic images, which were changed with varying closure stress. The subharmonic images always gave an accurate length of partially closed cracks, in contrast to the fundamental images in which the crack length was underestimated. Significant similarities in generation and resonance phenomena of subharmonic waves, acoustic emission, and the vibration of microbubbles are discussed.

AB - The authors constructed a novel apparatus based on subharmonic ultrasound for the accurate imaging of closed cracks. Linear and nonlinear responses not only from the tip but also from other parts of cracks were observed in fundamental and subharmonic images, which were changed with varying closure stress. The subharmonic images always gave an accurate length of partially closed cracks, in contrast to the fundamental images in which the crack length was underestimated. Significant similarities in generation and resonance phenomena of subharmonic waves, acoustic emission, and the vibration of microbubbles are discussed.

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Imaging of closed cracks using nonlinear response of elastic waves at subharmonic frequency

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