G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 25/72 (2006.01)
Patent
CA 2594578
Disclosed is a method for determining the degree to which parts, especially parts that are exposed to loads (11) which change over time, are damaged. According to the invention, the part (10) is actively excited (20). A sector of the surface of the excited part (10) is recorded by means of a thermographic apparatus (30) which records also small cracks, microcracks (15), and microplastic zones having a length or size of less than 2 mm on the surface of the part (10). The thermographic apparatus (30) feeds the recorded images with the small cracks, microcracks (15), and microplastic zones to an evaluation unit (40). The evaluation unit (40) systematically evaluates the represented distribution of the small cracks, microcracks (15), and microplastic zones according to a predefined process. The degree to which the part (10) has been damaged is determined from the evaluated data of the distribution of the small cracks, microcracks (15), and microplastic zones.
L'invention concerne un procédé destiné à déterminer l'état d'endommagement d'un composant, notamment de composants exposés à des contraintes (11) variables dans le temps. On procède à une excitation active (20) du composant (10). Une section de la surface du composant excité (10) est enregistrée au moyen d'un dispositif de thermographie (30) enregistrant de petites fissures, des microfissures (15) et des zones microplastiques présentant une longueur ou des dimensions inférieures à 2 mm sur la surface du composant (10). Le dispositif de thermographie (30) fournit les images enregistrées et les petites fissures, microfissures (15) et zones microplastiques à une unité d'évaluation (40). L'unité d'évaluation (40) évalue systématiquement la répartition reproduite des petites fissures, microfissures (15) et zones microplastiques selon un procédé prédéfini. L'état d'endommagement du composant (10) est déterminé à partir des données évaluées de la répartition des petites fissures, microfissures (15) et zones microplastiques.
Medgenberg Justus
Ummenhofer Thomas
Ridout & Maybee Llp
Technische Universitaet Carolo-Wilhelmina Zu Braunschweig
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