Reflection of Ultrasonic Waves by an Array of Microcracks
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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
Specular reflection of ultrasonic waves by a flaw plane is affected by the degree of contact of the flaw-plane faces. In general terms, a flaw plane may be viewed as a region where separation zones and contact zones can both exist, and friction may be significant over the contact zones. Achenbach and Norris1 have proposed a set of nonlinear flaw-plane conditions to account for the separation and friction effects. Other conditions, of a linear type, have been discussed by Thompson and Fiedler2.