Effet de surface libre dans les agrégats polycristallins en fatigue à grand nombre de cycles.
Communication avec acte
Auteur
ROBERT, CamilleHOR, Anis 
PALIN-LUC, Thierry MOREL, Franck SAINTIER, NicolasRésumé
An analysis of high cycle fatigue behavior is done via the numerical simulation of polycrystalline aggregates. Different metallic materials with a FCC crystalline structure, but different cubic elastic coefficients, are investigated. Several statistical elementary volumes (SEV), consisting of 300 grains with isotropic texture and equiaxed geometries, are loaded at the median macroscopic fatigue limit for 107 cycles. Three different models are studied: 2D generalized plane strain, 3D periodic and 3D periodic with a free surface. Different mesoscopic variables are analyzed using extreme value statistics. The results show a detrimental e ect on the fatigue strength of the modeled aggregates with a free surface, if the crystalline elastic anisotropy is sufficient.
Fichier(s) constituant cette publication
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Documents liés
Visualiser des documents liés par titre, auteur, créateur et sujet.
-
Article dans une revue avec comité de lecture; ;PALIN-LUC, Thierry; MOREL, Franck; SAINTIER, Nicolas (Elsevier, 2014)
Multiaxial high cycle fatigue modeling of materials is an issue that concerns many industrial domains (automotive, aerospace, nuclear, etc.) and in which many progress still remains to be achieved. Several approaches exist ...
-
Article dans une revue avec comité de lectureROBERT, Camille; SAINTIER, Nicolas; PALIN-LUC, Thierry; MOREL, Franck (Elsevier, 2012)
An analysis of high cycle multiaxial fatigue behaviour is conducted through the numerical simulation of polycrystalline aggregates using the finite element method. The metallic material chosen for investigation is pure ...
-
Article dans une revue avec comité de lecture;SAINTIER, Nicolas; PALIN-LUC, Thierry; MOREL, Franck (Elsevier, 2011)
Numerical study of high cycle fatigue behaviour of copper polycrystalline aggre- gates. An analysis of high cycle fatigue behaviour is undertaken via the numerical simulation of polycrystalline aggregates. The metallic ...
-
Communication avec acteLE, Viet-Duc; BELLETT, Daniel; MOREL, Franck; SAINTIER, Nicolas; PALIN-LUC, Thierry; PESSARD, Etienne; (MATEC Web of Conferences, 2014)
The aim of this work is to propose simple analytical tools to predict the fatigue strength of cast aluminium components as a function of the casting process and post-cast treatment. The proposed methodology is based on the ...
-
Article dans une revue avec comité de lecture; ;ROBERT, Camille; ; ; MOREL, Franck (Elsevier BV, 2022-03-08)
The mechanical performances of additive manufactured (AM) material are highly dependent on the fabrication process which inevitably results in surface imperfection as well as porosity. In the present study, the high cycle ...