| Issue |
Matériaux & Techniques
Volume 74, Number 3-4, 1986
|
|
|---|---|---|
| Page(s) | 81 - 84 | |
| DOI | https://doi.org/10.1051/mattech/198674030081 | |
| Published online | 19 April 2017 | |
Fermeture et ouverture de fissure de fatigue : détection et mesure par une méthode ultrasonore
Detection and measurement of fatigue crack by an ultrasonic method
Section Ultrasons, Laboratoire Matériaux, Ecole Centrale des Arts et Manufactures
Abstract
In order to assess fatigue crack propagation, one of the most used law 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 crack tip and record of echodynamic. It detects and measures accurately both closure and opening of crack (corresponding length 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.
© SIRPE 1986
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