Simulation and Analysis of Subharmonics and Tail Effect for Ultrasonic Nondestructive Evaluation of Closed Cracks
スポンサーリンク
概要
- 論文の詳細を見る
Subharmonics are generated at closed cracks by the nonlinear effect of large-amplitude ultrasound. This effect has the possibility of more accurate detection and evaluation of closed cracks. Also, it was reported that the tail part of the transmitted wave through the cracks has a peculiar wave, which is called the "tail effect". Thus far, the mechanisms of the tail effect have not been revealed. In this paper, we introduced a realistic input wave into the previous model, which shows the interaction between closed cracks and large-amplitude ultrasound. As a result, we reproduced both the subharmonics and the tail effect for the first time. Furthermore, the mechanism was verified by comparing the input and output waveforms and using a potential energy diagram. Based on these findings, we proposed novel approaches for nondestructive evaluation of closed cracks.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2005-06-15
著者
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Ohara Yoshikazu
Department Of Cardiology Kochi Health Sciences Center
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Sasaki Ryouta
Department Of Materials Processing Tohoku University
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Ogata Toshihiro
Department Of Electronic Engineering Faculty Of Science And Engineering Saga University
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Mihara Tsuyoshi
Department Of Materials Processing Graduate School Of Engineering Tohoku University
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Yamanaka Kazushi
Department Of Applied Physics Faculty Of Engineering University Of Tokyo:(present Address)mechanical
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Ohara Yoshikazu
Department of Materials Processing, Tohoku University, Aoba 02, Sendai 980-8579, Japan
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Sasaki Ryouta
Department of Materials Processing, Tohoku University, Aoba 02, Sendai 980-8579, Japan
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Yamanaka Kazushi
Department of Materials Processing, Tohoku University, Aoba 02, Sendai 980-8579, Japan
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Mihara Tsuyoshi
Department of Materials Processing, Tohoku University, Aoba 02, Sendai 980-8579, Japan
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Ogata Toshihiro
Department of Materials Processing, Tohoku University, Aoba 02, Sendai 980-8579, Japan
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