Analysis of subharmonic resonance in ultrasonic testing of a closed crack based on gap-width-dependent property of interfacial stiffness

Kurihara Kenji, Keiichi Naito, Toshihiko Sugiura

研究成果: Conference contribution

2 被引用数 (Scopus)

抄録

Detection and sizing of a closed crack are difficult by the conventional ultrasonic testing, because ultrasonic waves propagate through the closed crack. Now nonlinear ultrasonic testing that uses subharmonics generated by effect of a closed crack is attracting attention. The objective of this study is to discuss a possible mechanism of the subharmonics in ultrasonic testing of a closed crack by introducing the idea of nonlinearity caused by gap-width-dependent property of interfacial stiffness, which successfully explained generation of superharmonics at a closed crack (Biwa, et al., 2005). We performed theoretical analysis of wave propagation in a continuum body based on a modeling including the above nonlinearity. Theoretical results predict generation of the subharmonics. They can appear if the input frequency close to twice the natural frequency. Conditions for the subharmonic resonance can also be found theoretically with respect to the input frequency and the input amplitude. We also carried out experiments of two aluminum specimens strongly pressed and verified our predicted results.

本文言語English
ホスト出版物のタイトル2011 IEEE International Ultrasonics Symposium, IUS 2011
ページ2468-2471
ページ数4
DOI
出版ステータスPublished - 2011 12月 1
イベント2011 IEEE International Ultrasonics Symposium, IUS 2011 - Orlando, FL, United States
継続期間: 2011 10月 182011 10月 21

出版物シリーズ

名前IEEE International Ultrasonics Symposium, IUS
ISSN(印刷版)1948-5719
ISSN(電子版)1948-5727

Other

Other2011 IEEE International Ultrasonics Symposium, IUS 2011
国/地域United States
CityOrlando, FL
Period11/10/1811/10/21

ASJC Scopus subject areas

  • 音響学および超音波学

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