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Detection and measurement of crack closure and opening by an ultrasonic method

✍ Scribed by Driss Bouami; Daniel De Vadder

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 719 KB
Volume: 23
Category: Article
ISSN: 0013-7944
DOI: 10.1016/0013-7944(86)90101-3

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✦ Synopsis

In order to assess fatigue crack propagation, one of the most-used laws is due to Elber. This involves, however, accurate measurement of the opening load of the crack which is closed at its tip. We propose a new ultrasonic method based on wave diffraction by the crack tip and a record of the echodynamic. It accurately detects and measures both closure and opening of cracks (corresponding lengths and loads). It is able to do that both near the lateral faces and in the bulk of the specimen. It is well suited to thick CT specimens.

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