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Novel Method Used to Inspect Curved and Tubular Structural MaterialsAt the NASA Lewis Research Center, a technique for the ultrasonic characterization of plates has been extended to tubes and to curved structures in general. In this technique, one performs measurements that yield a thickness-independent value of the local through-the-thickness speed of sound in a specimen. From such measurements at numerous locations across the specimen, one can construct a map of velocity as a function of location. The gradients of velocity indicated by such a map indicate local through-the-thickness-averaged microstructural parameters that affect the speed of sound. Such parameters include the pore volume fraction, mass density, fiber volume fraction (in the case of a composite material), and chemical composition. Apparatus was designed to apply the technique to tubular and other curved specimens.
Document ID
20050188544
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Roth, Don J.
(NASA Lewis Research Center Cleveland, OH, United States)
Baaklini, George Y.
Carney, Dorothy V.
Bodis, James R.
Rauser, Richard W.
Date Acquired
September 7, 2013
Publication Date
April 1, 1999
Publication Information
Publication: Research and Technology 1998
Subject Category
Structural Mechanics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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