|   3035 views |
 Technical Discussions | | Yasin Karavacýoðlu
 | Yasin Karavacýoðlu
|  01:17 Nov-26-1999
Lamb waves Dear experts and academissions;
I study on lamb waves for using on aging aircraft.
if anybody know about on this subject any article or url address
please inform me
| |
| | | |  Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998,  605    | | 01:32 Nov-28-1999
Re: Lamb waves : Dear experts and academissions;
: I study on lamb waves for using on aging aircraft.
: if anybody know about on this subject any article or url address
: please inform me
-----------------A search via NDTnet or the NDTnet Virtual Library should cover almost all Internet resources.
The NDT Search Form provides the selectable Keyword "lamb wave", however if you use the Virtual Library Search or any other Internet Search Engines you shall use also the synonym "guided wave" or "guided waves". Rolf Diederichs
| |
| | | | Grant Gordon
| Grant Gordon
| 05:44 Nov-29-1999
Re: Lamb waves : Dear experts and academissions;
: I study on lamb waves for using on aging aircraft.
: if anybody know about on this subject any article or url address
: please inform meYou may be interested in the following paper:
G. A. Gordon and T. D. Mast, "Wide-Area Imaging of
Ultrasonic Lamb Wave Fields by Electronic Speckle
Pattern Interferometry," Proc. SPIE Nondestructive
Techniques for Aging Aircraft, Airports, and Aerospace
Hardware III, 3586, pp. 297-309, 1999.
The paper has a large reference section that may also be helpful.
In the near future, the paper should be able at the fllowing URL:
http://www.arl.psu.edu/publications/publications.html
Cheers.
| |
| | | | Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 605 | | 07:50 Nov-29-1999
Re: Lamb waves Thanks to Grant Gordon's information I could find the
abstract of his publication through the NDTnet Library Search.
During the last month we have added 26 SPIE proceedings with
more than thousands of abstracts to the crawler range.Wide-area imaging of ultrasonic Lamb wave fields by electronic
speckle pattern interferometry, pp.297-309 Author(s): Grant A. Gordon, The Pennsylvania State Univ.,
State College, PA, USA; Truman D. Mast, The Pennsylvania State Univ.,
State College, PA, USA. Abstract: Ultrasonic elastic waves have traditionally been
examined using single point measurement techniques. In
this paper, we present a technique capable of recording
out-of-plane ultrasonic displacement data over wide
areas. The method employs 2D surface vibration data
collected via electronic speckle pattern interferometry
used in combination with laser modulation and optical
phase stepping. Using this rapid, wide-area measurement
method, images of ultrasonic Lamb waves onideal and
flawed plate structures are presented. For a single
ultrasonic excitation frequency, multiple data records
are collected as an externally excited traveling plate
wave moves through the sample. When an optical phase
shift is introduced between the data records, the data
can be processed to yield quantitative displacement
fields. The resulting processed images demonstrate
evidence of Lamb wave reflection, transmission and
scattering. Following the full field data collection, a
novel inverse scattering algorithm was applied to
reconstruct images of the scattering sources
responsible for the measured displacement field data.
The results of these investigations will be presented
and discussed in the context of detecting hidden flaws
in aging aircraft.
: : Dear experts and academissions;
: : I study on lamb waves for using on aging aircraft.
: : if anybody know about on this subject any article or url address
: : please inform me : You may be interested in the following paper:
: G. A. Gordon and T. D. Mast, "Wide-Area Imaging of
: Ultrasonic Lamb Wave Fields by Electronic Speckle
: Pattern Interferometry," Proc. SPIE Nondestructive
: Techniques for Aging Aircraft, Airports, and Aerospace
: Hardware III, 3586, pp. 297-309, 1999.
: The paper has a large reference section that may also be helpful.
: In the near future, the paper should be able at the fllowing URL:
: http://www.arl.psu.edu/publications/publications.html
: Cheers.
| |
| | | | Yasin Karavacýoðlu
| Yasin Karavacýoðlu
| 00:42 Nov-29-1999
Re: Lamb waves dear gordon;
Thank you for your interesting. I cant reach your article from internet.
Especially ý interested in sensivity of guided waves for detection of fatigue cracks. if you have any opinion,please inform me. Also what kind of probes can be usable.
best regards
| |
| | | |  Dave Lines
R & D,
Diagnostic Sonar Ltd, United Kingdom, Joined Nov 1998, 8 |
Dave Lines
R & D,
Diagnostic Sonar Ltd,
United Kingdom,
Joined Nov 1998
8
| 07:59 Nov-30-1999
Re: Lamb waves
: Dear experts and academissions;
: I study on lamb waves for using on aging aircraft.
: if anybody know about on this subject any article or url address
: please inform meYou may also be interested in the online proceedings of the 3rd Joint FAA/DoD/NASA Conference on Aging Aircraft held 20-23 Sep 99 in Albuquerque, New Mexico. These can be found on http://www.galaxyscientific.com/agingaircraft/home.htm. There were a couple of papers relating to Lamb waves, e.g. "Ultrasonic Technique for Hidden Corrosion Detection in Aircraft Wing Skin" by A. Chahbaz, J. Gauthier, M. Brassard, Tektrend International, Quebec, Canada, D.R. Hay, TISEC Inc. (see session 6C) but you may find more of interest. Dave Lines
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| | | | Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 605 | | 09:32 Nov-30-1999
Re: Lamb waves That's really a great source Dave Lines pointed out.
You can find about 15 NDT full-text articles, however as PDF downloads.
We'll add these articles to the crawler range, so that
it will be included into the Internet full-text search of the NDTnet Library.Rolf --------------------
: : Dear experts and academissions;
: : I study on lamb waves for using on aging aircraft.
: : if anybody know about on this subject any article or url address
: : please inform me : You may also be interested in the online proceedings of the 3rd Joint FAA/DoD/NASA Conference on Aging Aircraft held 20-23 Sep 99 in Albuquerque, New Mexico. : These can be found on http://www.galaxyscientific.com/agingaircraft/home.htm. : There were a couple of papers relating to Lamb waves, e.g. "Ultrasonic Technique for Hidden Corrosion Detection in Aircraft Wing Skin" by A. Chahbaz, J. Gauthier, M. Brassard, Tektrend International, Quebec, Canada, D.R. Hay, TISEC Inc. (see session 6C) but you may find more of interest. : Dave Lines
| |
| | | | Rolf Diederichs
Director,
NDT.net, Germany, Joined Nov 1998, 605 | | 00:49 Dec-01-1999
Re: Lamb waves : dear gordon;
: Thank you for your interesting. I cant reach your article from internet.
: Especially ý interested in sensivity of guided waves for detection of fatigue cracks. if you have any opinion,please inform me. Also what kind of probes can be usable.
: best regards
-----------------There are still not ALL papers available via the Internet!
But at SPIE you can order online a paper for $15.00 (non-members). Try this link directly to the order of the paper.
http://bookstore.spie.org/cgi-bin/order.acgi?bc=1999SPIE%2e3586%2e%2e297G&ti=Wide-area%20imaging%20of%20ultrasonic%20Lamb%20wave%20fields%20by%20electronic%20speckle%20pattern%20interferometry&t=a&of=1 Rolf
| |
| | | | Eulalio Rodriguez
| Eulalio Rodriguez
| 03:47 Sep-17-2000
Re: Lamb waves I did my Ph D. diseertation on the use of Lamb waves
to mesure the elasticity constants of thin plates.
If you intertested in a copy let me know. The reserach as was done
at the Univeristy of Texas at el Paso in 1998. See a paper at
http://www.ndt.net/abstract/asntf97/004.htm
| |
| | |  MUSE Mobile Ultrasonic EquipmentThe MUSE, a portable ultrasonic imaging system, was developed for in-field inspections of light-weig ... ht structures. The MUSE consists of a motor-driven manipulator, a water circulation system for the acoustic coupling and a portable ultrasonic flaw detector (USPC 3010). The MUSE provides images of internal defects (A-, B-,C- and D-scan). >  SONOAIR - air-coupled Phased Array Ultrasonic Inspection SystemFor highly attenuating materials, the performance of the system is critical. The ultrasonic sensors, ... the scanning area and the system settings should be flexibly adapted to the test task and the material.
These high expectations are met with the new and modular testing system SONOAIR. With the world’s first air-coupled phased-array UT inspection system SONOAIR we developed a technology that works with up to 4 transmitter and receiver channels with freely configurable square wave burst transmitters as wells as low noise receiving amplifiers. >  TVC awarded UKAS accreditationTVC are delighted to finally announce we have been awarded UKAS
accreditation for our calibration ... laboratory.
Laboratory accreditation to ISO/IEC 17025:2005 enables us to
conduct the Electrical Verification of Ultrasonic Flaw Detection
Equipment to BS EN 12668-1:2010. It has taken many months of hard
work and we want to thank our staff for all their efforts during
this massive undertaking. >  Conformable wedge transducerThe conformability is obtained with a flexible membrane filled with water between the transducer and ... the inspected component. The coupling between the membrane and the component requires a small quantity of water or couplant. The conformable wedge combines the acoustic performance of immersion technique with good coupling and low attenuation. > |
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NDTnet Search Results: Lamb Wave
