Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Mont A. Johnson"'
Autor:
Mont A. Johnson, Yves H. Berthelot
Publikováno v:
The Journal of the Acoustical Society of America. 101:2986-2989
Experiments with laser generation and detection of ultrasound in copy paper indicate that earliest arrivals of ultrasound are antisymmetric. A likely explanation is that the out-of-plane interferometer is relatively insensitive to the symmetric compr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a62d3909318554e5b88a83a482258af
https://doi.org/10.1121/1.419473
https://doi.org/10.1121/1.419473
Publikováno v:
Ultrasonics. 34:703-710
Experiments have been conducted to study the generation of ultrasonic Lamb waves in copy paper using a pulsed Nd : YAG laser. The signals were detected with an out-of-plane heterodyne Ar+ laser interferometer. The effect of the generation laser spot
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5af4a1661b1591fbf17f4cc7dec88834
https://doi.org/10.1016/0041-624x(96)00068-6
https://doi.org/10.1016/0041-624x(96)00068-6
Publikováno v:
1996 IEEE Ultrasonics Symposium. Proceedings.
The use of a laser ultrasonics method to induce and detect Lamb waves in paper was demonstrated. A pulsed Nd:YAG laser was used for Lamb wave excitation. Detection of out-of-plane and in-plane surface motions was accomplished using a CW Ar:ion laser
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::099b9c3dc0afbd8b364f60d7a689c136
https://doi.org/10.1109/ultsym.1996.584170
https://doi.org/10.1109/ultsym.1996.584170
Autor:
Yves H. Berthelot, Mont A. Johnson
Publikováno v:
Optical Engineering. 36:408
Ultrasonic Lamb waves are generated in 90 µm thin copy paper with a Q-switched low-power Nd:YAG laser and detected with an Ar+ laser Doppler interferometer. This noncontact method enables one to determine two elastic constants (C44 or C55) that are
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db466f18c0a087ee049e2f12bb703f47
https://doi.org/10.1117/1.601423
https://doi.org/10.1117/1.601423
Publikováno v:
The Journal of the Acoustical Society of America. 98:2916-2916
At present, the paper industry lacks an on‐line, noncontact quality control system. Several studies indicate that there are strong correlations between paper strength and elastic stiffness properties. These elastic properties or elastic coefficient
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b36a021faff5baf12bf72c5882538a19
https://doi.org/10.1121/1.414211
https://doi.org/10.1121/1.414211