رسالة جامعية
Ultrasound propagation in anisotropic and heterogeneous media : application to evaluation the elastic properties and attenuation in steel centrifugally and Inconel welds ; Propagation des ultrasons en milieu hétérogène et anisotrope : application à l'évaluation des propriétés d'élasticité et d'atténuation d'aciers moules par centrifugation et de soudures en Inconel
| العنوان: | Ultrasound propagation in anisotropic and heterogeneous media : application to evaluation the elastic properties and attenuation in steel centrifugally and Inconel welds ; Propagation des ultrasons en milieu hétérogène et anisotrope : application à l'évaluation des propriétés d'élasticité et d'atténuation d'aciers moules par centrifugation et de soudures en Inconel |
|---|---|
| المؤلفون: | Bodian, Pape Arago |
| المساهمون: | Matériaux, ingénierie et science Villeurbanne (MATEIS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), INSA de Lyon, Joël Courbon, Philippe Guy |
| المصدر: | https://theses.hal.science/tel-00679694Test ; Autre. INSA de Lyon, 2011. Français. ⟨NNT : 2011ISAL0024⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2011 |
| المجموعة: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| مصطلحات موضوعية: | NDT - Nondestructive testing, Ultrasonic testing, Heterogeneous material, Anisotropic medium, Elastic constant, Wave Propagation, Longitudinal wave, Transverse wave, CND - Contrôle non destructif, Contrôle par ultrason, Matériau hétérogène, Milieu anisotrope, Constante d’élasticité, Atténuation, Propagation des ondes, Onde longitudinale, Onde transversale, [SPI.OTHER]Engineering Sciences [physics]/Other |
| الوصف: | In industry, to limit the number of experimental models in R&D projects, to better understand and to well interpret the complex ultrasonic phenomena observed du ring controls on site, simulations of ultrasonic controls are carried out. These simulations are all the more realistic as the description of structures to control is accurate, especially in terms of elastic constants, and intrinsic attenuation. The objectives of this study are firstly to improve knowledge about the influence of the metallurgical properties of anisotropie and heterogeneous materials on the ultrasonic propagation and secondly the performance of the computation codes (software ATHENA EDF) which need to have the relevant inputs, particularly as regards the elastic constants and ultrasonic attenuation. This study is dedicated to the characterization of coarse materials such as austenitic-ferritic steel centrifugally cast and the welding in steel austenitic stainless or in alloy nickel-based. A unique experimental system for measuring the elastic constants and attenuation at oblique incidence has been developed. The strong point of this device is that it can work beyond the longitudinal critical angle and thus to measure the attenuation properties of transversal waves. The elastic constants are deduced from ultrasonic speed from an optimization process based on the resolution of Inverse problems. We have shown the potential of global optimization algorithms such as genetic algorithms Jess likely to converge to local minima of the function to minimize. The results obtained from experimental measurements are in agreement with literature. Results of the attenuation of the longitudinal and transverse waves by beam decomposition into spectrum of plane waves are represented. ; En sciences et dans l’industrie pour limiter le nombre de maquettes expérimentales dans les projets R&D afin de mieux comprendre et de bien interpréter les phénomènes ultrasonores complexes observés sur site, des simulations de contrôles ultrasonores sont effectuées. ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| العلاقة: | NNT: 2011ISAL0024; tel-00679694; https://theses.hal.science/tel-00679694Test; https://theses.hal.science/tel-00679694/documentTest; https://theses.hal.science/tel-00679694/file/these.pdfTest |
| الإتاحة: | https://theses.hal.science/tel-00679694Test https://theses.hal.science/tel-00679694/documentTest https://theses.hal.science/tel-00679694/file/these.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.2EB22B7F |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |