Theoretical Predictions and Experimental Measurements of Echo Responses from Tilted Flat-Bottomed Holes

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1996
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Lhémery, Alain
Weight, John
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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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In some earlier work, semi-analytic methods were proposed to predict echo responses from point-like targets [1] and normally aligned flat-bottomed holes in solids (FBH) [2]. A new, more general formulation has recently been developed (hereafter, the “elastic model” [3]), capable of predicting responses from defects of arbitrary shape. In this paper, theoretical predictions using the new model are compared with experimentally measured echo responses from tilted FBH’s, where the hole bottom is tilted relative to the transducer axis. A related study [4] has already been presented in which experimental echo responses from tilted disks immersed in a fluid were compared with results predicted by an earlier model [5]. In that earlier model, mode conversion was not taken into account and only compression waves were considered (the “acoustic model”).

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Mon Jan 01 00:00:00 UTC 1996