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Technical Discussions
hemachandra
hemachandra
04:43 Dec-15-2008
mode conversion

Dear all ,
1)why cant we use angled longitudinal beam for inspection as it has higehr velocity? can we able to produce angled longitudinal beam?
2) in TOFD we use angled Longitudianl beam? so i think we can get angled longitudinal beam.
3)mode conversion start in material or wedge?????????


 
 Reply 
 
Ed Ginzel
R & D, -
Materials Research Institute, Canada, Joined Nov 1998, 1286

Ed Ginzel

R & D, -
Materials Research Institute,
Canada,
Joined Nov 1998
1286
05:52 Dec-15-2008
Re: mode conversion
Hemachandra
Angled compression mode is commonly used in ultrasonic applications...a great summary has been provided of the sort of applications it finds at http://www.ndt.net/article/pow1297/schmid/schmid.htm

By mode conversion we understand the change of a compression mode to a transverse mode or visa versa. These events occur as a result of boundary interactions of a wavefront.

An interesting exception to this assumption is the SH shear mode which does not mode convert to L mode!

Ed
----------- Start Original Message -----------
: Dear all ,
: 1)why cant we use angled longitudinal beam for inspection as it has higehr velocity? can we able to produce angled longitudinal beam?
: 2) in TOFD we use angled Longitudianl beam? so i think we can get angled longitudinal beam.
: 3)mode conversion start in material or wedge?????????
------------ End Original Message ------------




 
 Reply 
 

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