Titre :	Etude et modelisation de la resistance a la rupture sur des eprouvettes entaillees
Type de document :	texte imprimé
Auteurs :	Mustafa Moussaoui, Auteur ; Salim Meziaini, Directeur de thèse
Editeur :	constantine [Algérie] : Université Constantine 1
Année de publication :	2015
Importance :	124 f.
Format :	30 cm.
Note générale :	2 copies imprimées disponibles
Langues :	Français (fre)
Catégories :	Français - Anglais Génie Mécanique
Tags :	Construction mécanique  Approche volumétrique  gradient relatif  contrainte effective  Entaille  zone plastique  Volumetric approach  Relative gradient  Effective stress  Notch  Plastic zone  المنهج الحجمي  التدرج النسبي  الأجهاد الفعال  الثلمة  المنطق البلاستيكية
Index. décimale :	620 Génie Mécanique
Résumé :	The presence of geometric discontinuities in mechanical components induces a non-uniform stresses distribution. These discontinuities locally generate stress concentrations which can therefore cause premature failure if it is not properly taken into account in the design of the mechanical components. The parameters undergo variations going to the ruin of mechanical systems or structures. To take into account the factors that come into play, a study was carried out to analyze the variation of the angle and radius of notch on the notch stress intensity factor r I K and the plastic region in the vicinity of notch root. A specimen CT made in steel with different notch under a uniform tensile loading has been considered as finite element model. The considered approach is a local approach defined by the volumetric approach. The parameters of the volumetric approach i.e. the effective distance, effective stress and relative stress gradient are calculated from the finite element method under Castem software. Application of the volumetric approach in the case of elastoplastic behaviour has made it possible to realize the changing effect of the notch parameters. The results obtained are confronted to the models of Irwin and Creager - Paris.
Diplôme :	Doctorat en sciences
En ligne :	../theses/gmecanique/MOU6703.pdf
Format de la ressource électronique :	pdf
Permalink :	index.php?lvl=notice_display&id=9920

Etude et modelisation de la resistance a la rupture sur des eprouvettes entaillees [texte imprimé] / Mustafa Moussaoui, Auteur ; Salim Meziaini, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2015 . - 124 f. ; 30 cm.
2 copies imprimées disponibles

Langues : Français (fre)

Catégories :	Français - Anglais Génie Mécanique
Tags :	Construction mécanique  Approche volumétrique  gradient relatif  contrainte effective  Entaille  zone plastique  Volumetric approach  Relative gradient  Effective stress  Notch  Plastic zone  المنهج الحجمي  التدرج النسبي  الأجهاد الفعال  الثلمة  المنطق البلاستيكية
Index. décimale :	620 Génie Mécanique
Résumé :	The presence of geometric discontinuities in mechanical components induces a non-uniform stresses distribution. These discontinuities locally generate stress concentrations which can therefore cause premature failure if it is not properly taken into account in the design of the mechanical components. The parameters undergo variations going to the ruin of mechanical systems or structures. To take into account the factors that come into play, a study was carried out to analyze the variation of the angle and radius of notch on the notch stress intensity factor r I K and the plastic region in the vicinity of notch root. A specimen CT made in steel with different notch under a uniform tensile loading has been considered as finite element model. The considered approach is a local approach defined by the volumetric approach. The parameters of the volumetric approach i.e. the effective distance, effective stress and relative stress gradient are calculated from the finite element method under Castem software. Application of the volumetric approach in the case of elastoplastic behaviour has made it possible to realize the changing effect of the notch parameters. The results obtained are confronted to the models of Irwin and Creager - Paris.
Diplôme :	Doctorat en sciences
En ligne :	../theses/gmecanique/MOU6703.pdf
Format de la ressource électronique :	pdf
Permalink :	index.php?lvl=notice_display&id=9920