@inproceedings{b8297f6a94224b9c992cf6fce0a875f9,
title = "Detection of a closed crack by nonlinear acoustics using ultrasonic transducers",
abstract = "Recently diffusion joining and friction stir joining have been used for a solid state bonding. They can be affected by impurity of the atmosphere, temperature etc, so a closed crack may arise. This research investigates applicability of a new method by nonlinear acoustics to detection of closed cracks. Numerical analysis and experiment were conducted on a specimen with a closed crack. As a result, higher harmonics appeared in received signals. The longer the crack was, the larger the amplitude of higher harmonics became. These results show a possibility of nondestructive testing by nonlinear acoustics.",
keywords = "Closed crack, FEM, Nonlinear acoustics, UT",
author = "Soshu Hirata and Toshihiko Sugiura",
year = "2006",
month = mar,
day = "6",
doi = "10.1063/1.2184540",
language = "English",
isbn = "0735403120",
series = "AIP Conference Proceedings",
pages = "277--282",
booktitle = "Review of Progress in Quantitative Nondestructive Evaluation",
note = "Review of Progress in Quantitative Nondestructive ; Conference date: 31-07-2005 Through 05-08-2005",
}