Impulse Analysis of Ultrasonic Indicia

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1974
Authors
Packman, Paul
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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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What I would like to talk about today is essentially a portion of a program that has been sponsored by the AFOSR. The primary objectives of the program are to try and analyze defects associated with fastener holes. These include straight-shank fastener holes, tapered shank fastener holes, and cold-worked holes. The total scope of the program is to try and understand the factors that affect the detection capabilities associated with the fastener hole, both with the fastener in place and with the fastener out (including metallurgical, geometric, and local stresses), and to see if there is some way of characterizing the size, the shape and the orientation of the hole in the hope of differentiating between what might be considered a benign defect versus a critical defect. A benign defect, for example, could be some scratches on the inside of the hole that might not be expected to grow. I say, "would not be expected to grow," because you don't know if they are or not.

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