Location

La Jolla, CA

Start Date

1979 12:00 AM

Description

An acoustic technique for measuring inhomogeneous stress fields in externally loaded solids is described. This method requires a measurement of transit time of a longitudinal acoustic wave through a stressed thin metal specimen using a small diameter water-coupled acoustic transducer. The transducer is mechanically scanned over the surface of the sample by a computer controlled system to take stress field contour plots. Samples investigated include an aluminum plate with a centrol hole, a double edge-notched panel and a single edge-notched panel. In addition to measuring stress fields, the nondestructive determination of stress intensity factors is also discussed.

Book Title

Proceedings of the ARPA/AFML Review of Progress in Quantitative NDE

Chapter

12. Techniques for Flaw Reconstruction Using Short Wavelengths

Pages

447-453

Language

en

File Format

application/pdf

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Jan 1st, 12:00 AM

Ultrasonic Measurements of Inhomogenous Stress Fields

La Jolla, CA

An acoustic technique for measuring inhomogeneous stress fields in externally loaded solids is described. This method requires a measurement of transit time of a longitudinal acoustic wave through a stressed thin metal specimen using a small diameter water-coupled acoustic transducer. The transducer is mechanically scanned over the surface of the sample by a computer controlled system to take stress field contour plots. Samples investigated include an aluminum plate with a centrol hole, a double edge-notched panel and a single edge-notched panel. In addition to measuring stress fields, the nondestructive determination of stress intensity factors is also discussed.