✦ LIBER ✦

Some observations on stress wave emission as a measure of crack growth

✍ Scribed by W. W. Gerberich; C. E. Hartbower

Publisher: Springer Netherlands
Year: 1967
Tongue: English
Weight: 432 KB
Volume: 3
Category: Article
ISSN: 1573-2673
DOI: 10.1007/bf00183950

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✦ Synopsis

A technique for measuring stress waves emitted during slow crack growth is briefly described. The number and size of the stress waves generated appears to bear a unique relationship to the amount of crack growth. From elasticity theory, a semi-empirical relationship is developed. ~A ~ (~]g)2 E/K 2, where AA is the incremental area swept out by the crack, ~g, is the sum of the stress-wave amplitudes associated with that increment of growth, E is the elastic modulus and K is the applied stress-intensity factor. This relationship is shown to be valid for about 100 data points obtained from crack growth in high-strength aluminum, titanium and steel alloys.

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