Contribution to the modeling of Eddy-Current nondestructive testing systems / Mohamed Naidjate

Public ISBD Titre : Contribution to the modeling of Eddy-Current nondestructive testing systems : application to the characterization of carbon fibers composite materials Type de document : texte manuscrit Auteurs : Mohamed Naidjate, Auteur ; Ibn Khaldoun Lefkaier, Directeur de thèse Editeur : Laghouat : Université Amar Telidji - Département de génie électrique Année de publication : 2021 Importance : 131 p Format : 27 cm. Accompagnement : 1 disque optique numérique (CD-ROM) Note générale : Option : Electrical engineering Langues : Anglais (eng) Résumé : Our work is a contribution to the non-destructive testing of carbon fiber composites (CFCM) by eddy current technique. On the theoretical side, we propose a formulation able to emulate the electromagnetic behavior of MCFC while allowing a gain in the computational costs, since we mesh only the conductive parts, in this case, the fibers. To build automatically the fibers geometry, we proposed a technique based on microscopic images and the "Bubble-mesh" algorithm. Thus, a simulation at the fiber scale is possible. On the practical side, we propose a new multi-element sensor based on triangular coils capable of shaping the EM field to configurations similar to a rotating rectangular coil. These different configurations of the EM field are electronically controlled which avoids mechanical rotation and induced vibrations. As a result, the sensor is robust, fast and accurate. The last part of the work was dedicated to eddy current imaging using the theoretical and practical tools we have developed. note de thèses : Thèse de doctorat en génie électrique Contribution to the modeling of Eddy-Current nondestructive testing systems : application to the characterization of carbon fibers composite materials [texte manuscrit] / Mohamed Naidjate, Auteur ; Ibn Khaldoun Lefkaier, Directeur de thèse . - Laghouat : Université Amar Telidji - Département de génie électrique, 2021 . - 131 p ; 27 cm. + 1 disque optique numérique (CD-ROM). Option : Electrical engineering Langues : Anglais (eng) Résumé : Our work is a contribution to the non-destructive testing of carbon fiber composites (CFCM) by eddy current technique. On the theoretical side, we propose a formulation able to emulate the electromagnetic behavior of MCFC while allowing a gain in the computational costs, since we mesh only the conductive parts, in this case, the fibers. To build automatically the fibers geometry, we proposed a technique based on microscopic images and the "Bubble-mesh" algorithm. Thus, a simulation at the fiber scale is possible. On the practical side, we propose a new multi-element sensor based on triangular coils capable of shaping the EM field to configurations similar to a rotating rectangular coil. These different configurations of the EM field are electronically controlled which avoids mechanical rotation and induced vibrations. As a result, the sensor is robust, fast and accurate. The last part of the work was dedicated to eddy current imaging using the theoretical and practical tools we have developed. note de thèses : Thèse de doctorat en génie électrique

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