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Contrôle non destructif par ultrasons-laser de structures pleines à axe de révolution

Abstract : The development of new materials in industries creates new issues about their control. It is the case for SKF introduces ceramic rollers in its bearings. These rollers can have two different geometries, cylinder or barrel. Most methods of Non Destructive Testing developed for steel rollers analysis are not adapted for ceramic rollers. In fact, these equipments use electrical of metal materials properties to control a solid. In consequence, it is necessary to develop a new approach for ceramic structures. In this report, we are studying Ultrasonics Laser method. The use of lasers allows to generate and to detect ultrasound waves without contact on steel or ceramic media. A study of directivity patterns for the most common thermoelastic sources and calculation of dispersive curves due to cylindrical geometry have been done. The results of these studies allow us to interpret different signals obtained during ours experimentations. We have shown that the method was efficient for the detection of different types of defects present on ceramic and steel rollers. An original approach has been proposed and studied, theoretically and experimentally, to reduce significantly the time of control for a cylindrical roller. This approach have been extended to a ceramic barrel roller with success.
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Submitted on : Wednesday, September 29, 2021 - 2:12:36 PM
Last modification on : Saturday, October 9, 2021 - 3:21:36 AM

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  • HAL Id : tel-03358523, version 1

Citation

Vianney Nowinski. Contrôle non destructif par ultrasons-laser de structures pleines à axe de révolution. Acoustique [physics.class-ph]. Université de Valenciennes et Hainaut-Cambrésis, 2016. Français. ⟨NNT : 2016VALE0023⟩. ⟨tel-03358523⟩

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