{"id":2511,"date":"2019-03-14T09:45:36","date_gmt":"2019-03-14T08:45:36","guid":{"rendered":"https:\/\/csma.asso.univ-lorraine.fr\/?p=2511"},"modified":"2023-08-22T12:54:02","modified_gmt":"2023-08-22T12:54:02","slug":"proposition-de-sujet-de-these-thick-level-set-method-for-the-anisotropic-damage-to-cohesive-fracture-transition-in-quasi-brittle-materials-cea-paris-saclay","status":"publish","type":"post","link":"https:\/\/csma.fr\/en\/proposition-de-sujet-de-these-thick-level-set-method-for-the-anisotropic-damage-to-cohesive-fracture-transition-in-quasi-brittle-materials-cea-paris-saclay\/","title":{"rendered":"Proposition de sujet de th\u00e8se \u00ab Thick Level Set method for the anisotropic damage to cohesive fracture transition in quasi-brittle materials \u00bb, CEA Paris-Saclay"},"content":{"rendered":"

CEA Paris-Saclay, Paris-Saclay University, France<\/span><\/p>\n

(Collaboration: CEA, Ecole Normale Sup\u00e9rieure Paris-Saclay, Ecole Centrale Nantes)<\/p>\n

PhD thesis proposal (3 years): 01\/09\/2019 \u2013 31\/08\/2022<\/p>\n

Domaines<\/span> :\u00a0Computational mechanics, materials and structural mechanics.<\/p>\n

Encadrement<\/span>
\n(i) Prof. Rodrigue Desmorat, Ecole Normale Sup`erieure Paris-Saclay, Paris-Saclay University (desmorat@lmt.ens-cachan.fr<\/a>) ;
\n(ii) Prof. Nicolas Mo\u00a8es, Ecole Centrale de Nantes (nicolas.moes@ec-nantes.fr<\/a>) ;
\n(iii) Giuseppe Rastiello, CEA Paris-Saclay, Paris-Saclay University (giuseppe.rastiello@cea.fr<\/a>).<\/p>\n

R\u00e9sum\u00e9<\/span><\/div>\n
\n

La pr\u00e9vision de la fissuration des mat\u00e9riaux est un enjeu majeur de la m\u00e9canique structurelle. Le processus de fissuration des mat\u00e9riaux quasi-fragiles (ex. le b\u00e9ton) est cependant extr\u00eamement complexe. Il inclut une phase initiale caract\u00e9ris\u00e9e par la pr\u00e9sence de micro-fissures distribu\u00e9es dans un volume de mati\u00e8re de taille finie, puis certaines micro-fissures coalescent progressivement jusqu\u2019\u00e0 la formation d\u2019une fracture. La m\u00e9thode \u00ab Thick Level Set \u00bb (TLS) [Mo\u00ebs et al., 2011] permet de mod\u00e9liser la transition \u00ab continu \u2013 discontinu \u00bb (endommagement \u2013 fracture) dans un cadre th\u00e9orique et num\u00e9rique unitaire en s’appuyant sur une formulation de type \u00ab level-sets \u00bb. Dans les travaux ant\u00e9rieurs sur la m\u00e9thode TLS [Mo\u00ebs et al., 2011; L\u00e9 et al., 2018], des mod\u00e8les d\u2019endommagement isotropes simples ont \u00e9t\u00e9 consid\u00e9r\u00e9s. Cependant, des lois plus complexes (ex. anisotropes) sont n\u00e9cessaires pour repr\u00e9senter de mani\u00e8re plus r\u00e9aliste les ph\u00e9nom\u00e8nes en jeu. Le sujet de th\u00e8se propos\u00e9 consiste \u00e0 d\u00e9velopper une formulation TLS dans le contexte de la M\u00e9canique de l\u2019Endommagement anisotrope [Lemaitre et Desmorat, 2005; Desmorat, 2015]. Les algorithmes de r\u00e9solution et int\u00e9gration num\u00e9rique seront \u00e9galement \u00e9tudi\u00e9s. Des cas tests structuraux seront finalement simul\u00e9s afin de qualifier la m\u00e9thode et analyser les avantages d’une formulation anisotrope par rapport au cas isotrope. Une extension au cas de l’endommagement des mat\u00e9riaux ductiles (ex. les m\u00e9taux) sera \u00e9galement \u00e9tudi\u00e9e. A terme, cette formulation pourra \u00eatre utilis\u00e9e pour la simulation de la r\u00e9ponse m\u00e9canique de structures en b\u00e9ton et\/ou b\u00e9ton arm\u00e9 sous sollicitations quasi-statiques et dynamiques.<\/p>\n<\/div>\n

Offre compl\u00e8te<\/a><\/p>\n

L\u2019offre de th\u00e8se est \u00e9galement disponible (en version r\u00e9duite) au lien suivant : http:\/\/www-instn.cea.fr\/formations\/formation-par-la-recherche\/doctorat\/liste-des-sujets-de-these\/methode-thick-level-set-pour-la-transition-endommagement-anisotrope-fracture-cohesive,19-0226.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

CEA Paris-Saclay, Paris-Saclay University, France (Collaboration: CEA, Ecole Normale Sup\u00e9rieure Paris-Saclay, Ecole Centrale Nantes) PhD thesis proposal (3 years): 01\/09\/2019 \u2013 31\/08\/2022 Domaines :\u00a0Computational mechanics, materials and structural mechanics. Encadrement … Read more<\/a><\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[33],"tags":[],"class_list":["post-2511","post","type-post","status-publish","format-standard","hentry","category-offres-de-these"],"pp_statuses_selecting_workflow":false,"pp_workflow_action":"current","pp_status_selection":"publish","acf":[],"_links":{"self":[{"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/posts\/2511","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/comments?post=2511"}],"version-history":[{"count":1,"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/posts\/2511\/revisions"}],"predecessor-version":[{"id":4283,"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/posts\/2511\/revisions\/4283"}],"wp:attachment":[{"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/media?parent=2511"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/categories?post=2511"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csma.fr\/en\/wp-json\/wp\/v2\/tags?post=2511"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}