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Enseignement spécifique des masters - AE-10 : Non Destructive Testing

Descriptif

Nondestructive testing (NDT) is of major industrial interest for insuring safety and reliability of complex structures (nuclear plants, aircrafts, pipe-lines…). Among the various NDT methods used, techniques relying on the use of elastic waves at ultrasonic frequencies are the only ones which allow inspecting the whole volume of thick components; therefore, they are routinely used. The main NDT ultrasonic techniques make use of either bulk or guided waves. This mature technology is however still subject of intensive Researches and Developments (R&D) over a broad range from academic works to practical applications, to meet the growing needs from industry. French R&D in this field is at the highest level thanks to the strong needs emanating from its nuclear and aircraft industries which possess their own R&D teams working in close relation with academic laboratories, and the transfer of fundamental results to practical use is very efficient. There is a necessity for training engineers and researchers in this science to meet the numerous needs expressed.

Objectifs pédagogiques

Derive equations for elastic wave propagation in homogeneous isotropic or anisotropic media
Solve problems dealing with the interaction between ultrasonic beams and defects.
Design ultrasonic testing methods
Practice with the software platform CIVA developed at CEA

nombre d'heure en présentiel

33

nombre de blocs

11

Volume horaire par type d'activité pédagogique : types d'activité

  • Petite classe : 10
  • Cours magistral : 20

effectifs minimal / maximal

10/30

Diplôme(s) concerné(s)

domaines Saclay

Mention Mécanique.

Pour les étudiants du diplôme Master 2 Acoustical Engineering

basic knowledge in continuum mechanics

Format des notes

Numérique sur 20

Littérale/grade européen

Pour les étudiants du diplôme Master 2 Acoustical Engineering

Vos modalités d'acquisition :

Written or oral exam

Le rattrapage est autorisé (Note de rattrapage conservée)
  • le rattrapage est obligatoire si :
    Note initiale < 7
L'UE est acquise si Note finale >= 10
  • Crédits ECTS acquis : 3 ECTS

Le coefficient de l'UE est : 3

La note obtenue rentre dans le calcul de votre GPA.

L'UE est évaluée par les étudiants.

Pour les étudiants du diplôme Diplôme d'Ingénieur de l'Ecole Nationale Supérieure de Techniques Avancées

Le rattrapage est autorisé

    Programme détaillé

    A first lecture presents the industrial significance of NDT and specifically of ultrasonic NDT, investigates its history to explain the present situation of R&D to meet industrial needs by providing advanced tools (simulation, phased-array techniques). The other lectures are organized in three main parts.

    The first part aims at treating elastic wave propagation in homogeneous isotropic or anisotropic media, by studying the physical bases, equating wave propagation, and deriving wave solutions (bulk waves and guides waves)  –including asymptotic ones (ray)– which are classically developed for describing them. A particular emphasis will be put on the fact that, contrary to sound waves, elastic waves have different velocities related to different polarizations.

    The second part enters into detailed solutions dealing with complex phenomena arising when forming ultrasonic beams and when such beams interact with defects.

    The third part describes how this knowledge is implemented for designing ultrasonic testing methods: techniques exploiting time-of-flight of acquired signals after interaction with a defect, advanced imaging techniques based upon the used of phased-arrays. Nonlinear techniques which industrial implementation is under study are also broached. Lastly, practice with the software platform CIVA developed at CEA illustrates, through a few simple simulations made by students, the influence of the main parameters related to the component to be tested, to the transducer used or to the defect considered, on typical results of an examination.
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