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Auteur Leila Khammar |
Documents disponibles écrits par cet auteur (2)
Affiner la recherche Interroger des sources externesEtude et modélisation de la propagation des fissures sous chargement thermique cyclique. / Leila Khammar
Titre : Etude et modélisation de la propagation des fissures sous chargement thermique cyclique. Type de document : texte imprimé Auteurs : Leila Khammar, Auteur ; Mohamed-Salah Mecibah, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 119 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : Construction Mécanique Disque de frein Thermomécanique Fatigue fissure elliptique simulation numérique Brake disc Thermomechanics elliptical crack numerical simulation قرص الفرامل الميكانيكا الحرارية التعب الشق الاهليجي المحاكاة الرقمية Index. décimale : 620 Génie Mécanique Résumé : The purpose of this thesis is to present a study of the cyclic thermal behavior of crack propagation by taking the automobile brake disc as an example of a study for the prediction of their fatigue behavior. The numerical calculation strategy is based on the Ansys .15 calculation code. The latter, which is based on the finite element method and which has frictional contact management algorithms, is used to simulate in the application of braking the behavior of the mechanism despite its complexity.
At first, a purely thermal study is presented whose purpose is to calculate the initial heat flux entering the disc, then the mechanical study allowed us to calculate the hydraulic pressure, then a modeling of the loading and boundary conditions applied to the disk and the pads. A numerical approach was also performed based on the finite element method. A cyclic thermal study on the one hand, and a cyclical hermomechanical study on the other hand, were first put in place, allowing us to better understand the influence of the thermal flow and the hydraulic pressure on the propagation in width and depth of the elliptical fissure quite comparable to that linear. Finally, a three-dimensional approach, with a crack remaining elliptical during propagation, resulted in a prediction of fatigue strength.Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/KHA7437.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11176 Etude et modélisation de la propagation des fissures sous chargement thermique cyclique. [texte imprimé] / Leila Khammar, Auteur ; Mohamed-Salah Mecibah, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 119 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : Construction Mécanique Disque de frein Thermomécanique Fatigue fissure elliptique simulation numérique Brake disc Thermomechanics elliptical crack numerical simulation قرص الفرامل الميكانيكا الحرارية التعب الشق الاهليجي المحاكاة الرقمية Index. décimale : 620 Génie Mécanique Résumé : The purpose of this thesis is to present a study of the cyclic thermal behavior of crack propagation by taking the automobile brake disc as an example of a study for the prediction of their fatigue behavior. The numerical calculation strategy is based on the Ansys .15 calculation code. The latter, which is based on the finite element method and which has frictional contact management algorithms, is used to simulate in the application of braking the behavior of the mechanism despite its complexity.
At first, a purely thermal study is presented whose purpose is to calculate the initial heat flux entering the disc, then the mechanical study allowed us to calculate the hydraulic pressure, then a modeling of the loading and boundary conditions applied to the disk and the pads. A numerical approach was also performed based on the finite element method. A cyclic thermal study on the one hand, and a cyclical hermomechanical study on the other hand, were first put in place, allowing us to better understand the influence of the thermal flow and the hydraulic pressure on the propagation in width and depth of the elliptical fissure quite comparable to that linear. Finally, a three-dimensional approach, with a crack remaining elliptical during propagation, resulted in a prediction of fatigue strength.Diplôme : Doctorat en sciences En ligne : ../theses/gmecanique/KHA7437.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11176 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHA/7437 KHA/7437 Thèse Bibliothèque principale Thèses Disponible
Titre : Modelisation du mouvement du corps humain par la methode des elements finis. Type de document : texte imprimé Auteurs : Leila Khammar, Auteur ; Brahim Necib, Directeur de thèse Editeur : constantine [Algérie] : Université Constantine 1 Année de publication : 2014 Importance : 108 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
Génie MécaniqueTags : Construction mécanique Corps humain membres supérieurs et inférieurs modélisation élément finis contrainte déformation Biomécanique Human body upper and lower limbs modeling finite element stress deformation biomechanics جسم الإنسان أعضاء علوية وسفلية نمذجة العناصر المحدودة الإجهاد التشوه الميكانيكا الحيوية Index. décimale : 620 Génie Mécanique Résumé : The behavior analysis of the human body various members is very complicated view
to the complexity of its members and its various movements following the different planes and axes which governed it. Therefore, in biomechanical the human body modeling using the finite element method is essential and frequently used for the analysis of the various members of the human body in its static, dynamic, and during their movement. The members are often modeled by elements bars or beams, while the joints are considered as nodes. This will allow the biomechanics to obtain indications on the possible changes in order to improve the performance of the qualities of the prosthesis at level joints and constituent materials of the members.
In our work, the modeling is based on the assembly of the upper and lower limbs of the
human body separately statically and during their movement which is represented by the
movement of the arm and the hip respectively. Also a three-dimensional modeling was carried out and the state of stress and deformation of the various members has been analyzed. Furthermore, and during the real movement of these members, the change of angles is often negligible and a kinematic and dynamic analysis of the members was released where the position of speed and acceleration have been determined.
Diplôme : Magistère En ligne : ../theses/gmecanique/KHA6536.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9651 Modelisation du mouvement du corps humain par la methode des elements finis. [texte imprimé] / Leila Khammar, Auteur ; Brahim Necib, Directeur de thèse . - constantine [Algérie] : Université Constantine 1, 2014 . - 108 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
Génie MécaniqueTags : Construction mécanique Corps humain membres supérieurs et inférieurs modélisation élément finis contrainte déformation Biomécanique Human body upper and lower limbs modeling finite element stress deformation biomechanics جسم الإنسان أعضاء علوية وسفلية نمذجة العناصر المحدودة الإجهاد التشوه الميكانيكا الحيوية Index. décimale : 620 Génie Mécanique Résumé : The behavior analysis of the human body various members is very complicated view
to the complexity of its members and its various movements following the different planes and axes which governed it. Therefore, in biomechanical the human body modeling using the finite element method is essential and frequently used for the analysis of the various members of the human body in its static, dynamic, and during their movement. The members are often modeled by elements bars or beams, while the joints are considered as nodes. This will allow the biomechanics to obtain indications on the possible changes in order to improve the performance of the qualities of the prosthesis at level joints and constituent materials of the members.
In our work, the modeling is based on the assembly of the upper and lower limbs of the
human body separately statically and during their movement which is represented by the
movement of the arm and the hip respectively. Also a three-dimensional modeling was carried out and the state of stress and deformation of the various members has been analyzed. Furthermore, and during the real movement of these members, the change of angles is often negligible and a kinematic and dynamic analysis of the members was released where the position of speed and acceleration have been determined.
Diplôme : Magistère En ligne : ../theses/gmecanique/KHA6536.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=9651 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité KHA/6536 KHA/6536 Thèse Bibliothèque principale Thèses Disponible
