The Largest Open Access Portal of Nondestructive Testing (NDT)

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

01:32 Nov-28-1999
Re: Lamb waves

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

NDTnet Search Results: Lamb Wave

05:44 Nov-29-1999
Re: Lamb waves

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.

07:50 Nov-29-1999
Re: Lamb waves

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.

07:59 Nov-30-1999
Re: Lamb waves

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

09:32 Nov-30-1999
Re: Lamb waves

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

Conference on Aging Aircraft

00:49 Dec-01-1999
Re: Lamb waves

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

Order Paper