Simultaneous Determination of Orientation and Thickness in Anisotropic Media

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1998
Authors
Kline, Ronald
Deaton, John
Howard, D.
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Review of Progress in Quantitative Nondestructive Evaluation
Center for Nondestructive Evaluation

Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.

This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.

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Abstract

Ultrasonic travel-time techniques are commonly utilized for thickness determination in parts where the properties of the material are well characterized. Typically, this use has been limited to isotropic materials ( where the ultrasonic velocity used to determine the thickness is independent of the direction of propagation in the material ). For anisotropic materials, the situation is considerably more complicated due to the directional dependence of the ultrasonic velocity. If the orientation of the material is known, then the same approach used for isotropic samples can be used for thickness determination, providing one properly accounts for the known anisotropy in velocity. When the orientation and thickness are both unknown, a new approach must be utilized to avoid errors arising from the intrinsic variation in the ultrasonic velocity due to anisotropy.

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Thu Jan 01 00:00:00 UTC 1998