{"id":56327,"date":"2026-08-30T08:00:06","date_gmt":"2026-08-30T12:00:06","guid":{"rendered":"https:\/\/www.uqac.ca\/uqactualites\/?p=56327"},"modified":"2026-09-04T15:18:57","modified_gmt":"2026-09-04T19:18:57","slug":"omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these","status":"publish","type":"post","link":"https:\/\/www.uqac.ca\/uqactualites\/2026\/08\/30\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\/","title":{"rendered":"Omolbanin Saeidi, \u00e9tudiante au doctorat en ing\u00e9nierie, soutient sa th\u00e8se"},"content":{"rendered":"

Finissante au doctorat en ing\u00e9nierie, Omolbanin Saeidi a effectu\u00e9 sa soutenance de th\u00e8se le 24 ao\u00fbt 2026. Sous la direction de recherche de Daniel Marceau<\/a> (UQAC) et la codirection de Mohamed Rachik (Universit\u00e9 de technologie de Compi\u00e8gne), sa th\u00e8se a pour titre \u00abImpact du comportement thermo-\u00e9lectro-m\u00e9canique de l’assemblage cathodique sur la performance \u00e9lectrique des cellules d’\u00e9lectrolyse<\/em>\u00bb.<\/p>\n

Sous la pr\u00e9sidence de Lyne St-Georges<\/a> (UQAC), le jury d’\u00e9valuation \u00e9tait compos\u00e9 de Lukas Dion<\/a> (UQAC) et de Martin D\u00e9silets (Universit\u00e9 de Sherbrooke).<\/p>\n

\n
R\u00e9sum\u00e9 de la th\u00e8se<\/h5>\n

La r\u00e9sistance \u00e9lectrique de l\u2019ensemble cathodique des cellules d\u2019\u00e9lectrolyse repr\u00e9sente pr\u00e8s de 8% de la tension de fonctionnement (4,2V) d\u2019une cellule op\u00e9rant \u00e0 pr\u00e8s de 400 kA et ce, principalement en raison de la r\u00e9sistance de contact \u00e9lectrique (RCE) \u00e0 l\u2019interface fonte\/carbone. D\u00e9pendante de la temp\u00e9rature et de la pression de contact \u00e0 cette interface, la RCE d\u00e9pend indirectement de l\u2019espace d\u2019air initial g\u00e9n\u00e9r\u00e9 \u00e0 cette m\u00eame interface lors du scellement de la cathode. Lors du fonctionnement de la cellule d\u2019\u00e9lectrolyse, les diff\u00e9rents m\u00e9canismes de d\u00e9formation en pr\u00e9sence dans l\u2019assemblage cathodique font \u00e9voluer cet espace d\u2019air et par le fait m\u00eame, les conditions de contact. Outre l\u2019\u00e9volution des d\u00e9formations instantan\u00e9e apparaissant lors de la mont\u00e9e en temp\u00e9rature de l\u2019assemblage cathodique, des d\u00e9formations en fluage apparaissent dans l\u2019acier de la barre collectrice ainsi que dans la fonte de scellement et progressent tout au long de la vie de la cellule. Ces d\u00e9formations diff\u00e9r\u00e9es provoquent une r\u00e9duction des pressions de contact audit interface et par le fait m\u00eame, une augmentation de la RCE.
\nDans ce contexte, cette th\u00e8se vise notamment \u00e0 fournir une meilleure compr\u00e9hension de l\u2019impact des ph\u00e9nom\u00e8nes thermo-\u00e9lectro-m\u00e9canique se produisant dans l\u2019assemblage cathodique sur la performance \u00e9lectrique de la cellule d\u2019\u00e9lectrolyse et ce, afin d\u2019en am\u00e9liorer la conception.<\/p>\n

Dans un premier temps, une approche innovante, bas\u00e9e sur l\u2019utilisation de la technologie de scan 3D, est utilis\u00e9e afin de quantifier pr\u00e9cis\u00e9ment la distribution de l\u2019espace d\u2019air initiale \u00e0 l\u2019interface fonte\/carbone. En parall\u00e8le, le comportement m\u00e9canique des composants m\u00e9talliques de l\u2019assemblage cathodique est caract\u00e9ris\u00e9 \u00e0 hautes temp\u00e9ratures, incluant les comportements \u00e9lastique, plastique et de fluage. Par la suite, un mod\u00e8le de fluage adapt\u00e9, calibr\u00e9 et valid\u00e9 \u00e0 partir de donn\u00e9es exp\u00e9rimentales, est fourni en vue de son utilisation dans le logiciel d\u2019analyse par \u00e9l\u00e9ments finis ANSYS\u2122.<\/p>\n

Enfin, un mod\u00e8le num\u00e9rique simplifi\u00e9 (mod\u00e8le tranche) d\u2019une cellule \u00e9lectrolyse est d\u00e9velopp\u00e9 dans ANSYS\u2122, et ce, afin de quantifier l\u2019impact des ph\u00e9nom\u00e8nes diff\u00e9r\u00e9s sur une p\u00e9riode de 3,2 ans de fonctionnement. Les r\u00e9sultats obtenus mettent en \u00e9vidence une d\u00e9formation en fluage marqu\u00e9e au sein de l\u2019assemblage barre\/fonte, entra\u00eenant une augmentation significative et progressive de la chute de tension. Selon les donn\u00e9es fournies par le partenaire industriel, ce ph\u00e9nom\u00e8ne serait responsable d\u2019environ 19 % de la chute de tension observ\u00e9e en conditions op\u00e9rationnelles.<\/p>\n

\n

F\u00e9licitations \u00e0 Omolbanin Saeidi pour la soutenance de sa th\u00e8se de doctorat!<\/p>\n","protected":false},"excerpt":{"rendered":"

Finissante au doctorat en ing\u00e9nierie, Omolbanin Saeidi a effectu\u00e9 sa soutenance de th\u00e8se le 24 ao\u00fbt 2026. Sous la direction de recherche de Daniel Marceau (UQAC) et la codirection de Mohamed Rachik (Universit\u00e9 de technologie de Compi\u00e8gne), sa th\u00e8se a pour titre \u00abImpact du comportement thermo-\u00e9lectro-m\u00e9canique de l’assemblage cathodique sur la performance \u00e9lectrique des cellules […]<\/p>\n","protected":false},"author":5,"featured_media":56332,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2,2913],"tags":[21],"class_list":["post-56327","post","type-post","status-publish","format-standard","has-post-thumbnail","category-actualites","category-soutenance","tag-dsa"],"yoast_head":"\r\nOmolbanin Saeidi, \u00e9tudiante au doctorat en ing\u00e9nierie, soutient sa th\u00e8se - UQACtualit\u00e9s<\/title>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/www.uqac.ca\/uqactualites\/2026\/08\/30\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\/\" \/>\r\n<meta property=\"og:locale\" content=\"fr_CA\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Omolbanin Saeidi, \u00e9tudiante au doctorat en ing\u00e9nierie, soutient sa th\u00e8se - UQACtualit\u00e9s\" \/>\r\n<meta property=\"og:description\" content=\"Finissante au doctorat en ing\u00e9nierie, Omolbanin Saeidi a effectu\u00e9 sa soutenance de th\u00e8se le 24 ao\u00fbt 2026. Sous la direction de recherche de Daniel Marceau (UQAC) et la codirection de Mohamed Rachik (Universit\u00e9 de technologie de Compi\u00e8gne), sa th\u00e8se a pour titre \u00abImpact du comportement thermo-\u00e9lectro-m\u00e9canique de l’assemblage cathodique sur la performance \u00e9lectrique des cellules […]\" \/>\r\n<meta property=\"og:url\" content=\"https:\/\/www.uqac.ca\/uqactualites\/2026\/08\/30\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\/\" \/>\r\n<meta property=\"og:site_name\" content=\"UQACtualit\u00e9s\" \/>\r\n<meta property=\"article:published_time\" content=\"2026-08-30T12:00:06+00:00\" \/>\r\n<meta property=\"article:modified_time\" content=\"2026-09-04T19:18:57+00:00\" \/>\r\n<meta property=\"og:image\" content=\"https:\/\/www.uqac.ca\/uqactualites\/wp-content\/uploads\/2026\/08\/NUM_OmolbaninSaeidiA26_Uqctualite1920X1080.jpg\" \/>\r\n\t<meta property=\"og:image:width\" content=\"1920\" \/>\r\n\t<meta property=\"og:image:height\" content=\"1080\" \/>\r\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\r\n<meta name=\"author\" content=\"Service des communications et des relations publiques\" \/>\r\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\r\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Service des communications et des relations publiques\" \/>\n\t<meta name=\"twitter:label2\" content=\"Estimation du temps de lecture\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\r\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/2026\\\/08\\\/30\\\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/2026\\\/08\\\/30\\\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\\\/\"},\"author\":{\"name\":\"Service des communications et des relations publiques\",\"@id\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/#\\\/schema\\\/person\\\/366c45a0c4f0e677b41b4af5886e2018\"},\"headline\":\"Omolbanin Saeidi, \u00e9tudiante au doctorat en ing\u00e9nierie, soutient sa th\u00e8se\",\"datePublished\":\"2026-08-30T12:00:06+00:00\",\"dateModified\":\"2026-09-04T19:18:57+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/2026\\\/08\\\/30\\\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\\\/\"},\"wordCount\":577,\"image\":{\"@id\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/2026\\\/08\\\/30\\\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/wp-content\\\/uploads\\\/2026\\\/08\\\/NUM_OmolbaninSaeidiA26_Uqctualite1920X1080.jpg\",\"keywords\":[\"DSA\"],\"articleSection\":[\"Actualit\u00e9s\",\"Soutenance de th\u00e8se\"],\"inLanguage\":\"fr-CA\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/2026\\\/08\\\/30\\\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\\\/\",\"url\":\"https:\\\/\\\/www.uqac.ca\\\/uqactualites\\\/2026\\\/08\\\/30\\\/omolbanin-saeidi-etudiante-au-doctorat-en-ingenierie-soutient-sa-these\\\/\",\"name\":\"Omolbanin Saeidi, \u00e9tudiante au doctorat en ing\u00e9nierie, soutient sa th\u00e8se - 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