رسالة جامعية
Characterisation of stick-slip in model granular materials ; Frottement saccadé dans les matériaux granulaire modèles
| العنوان: | Characterisation of stick-slip in model granular materials ; Frottement saccadé dans les matériaux granulaire modèles |
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| المؤلفون: | Hoang, Minh Tam |
| المساهمون: | Laboratoire de Génie Civil et d'Ingénierie Environnementale (LGCIE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA), INSA de Lyon, Thiep Doanh, Jean-Noël Roux |
| المصدر: | https://theses.hal.science/tel-00743550Test ; Autre. INSA de Lyon, 2011. Français. ⟨NNT : 2011ISAL0062⟩. |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2011 |
| المجموعة: | HAL Lyon 1 (University Claude Bernard Lyon 1) |
| مصطلحات موضوعية: | Granular material, Stick-slip, Soil mechanics, Glass bead, Very loose sand, Drained sand, Instability, Dilatation, Large deformation, Small deformation, Quasi static cycle, Matériau granulaire, Frottement saccadé, Mécanique des sols, Bille de verre, Sable très lâche, Sable drainé, Instabilité, Grande déformation, Petite déformation, Cycle quasi-statique, [SPI.OTHER]Engineering Sciences [physics]/Other |
| الوصف: | The objectives of this study are the experimental characterisatino of the stick-slip instabilities in a model granular material and the identification of relevant control parameters. As monodisperse glass beads are subjected to drained triaxial compression tests, five macroscopic parameters characterize the stick-slip phenomenon: the deviator drop, the jump in volumetric contraction, the intermittence of the axial strain, Young’s modulus and Poisson’s ratio. The stick-slip events simultaneously affect the deviator stress and the volumetric strain. While the global material behavior is that of a loose sand, gradually contracting and hardening as it approaches its large strain critical state, its response in the “stick” phases immediately following the “slip” instabilities is similar to that of dense, dilatant sands, with a unique, linear stress-dilatancy relationship. Stick-slip events disappear beyond a critical axial strain rate, depending on the confining stress and on the grain diameter. The Young modulus associated to wave propagation varies with the confining stress according to a power law. The quasi-elastic modulus measured at the beginning of the stick phase is constant inside the elastic domain, as well as the Poisson ratio. The evolution of grain size and shape after one or several triaxial tests is monitored by laser granulometry and image analysis. The gradual vanishing of stick-slip events, on repeating the tests, is likely related to the global decreasing trend of average particle volume and to the formation of non-spherical objects, apparently by some phenomenon analogous to sintering. ; Cette étude a pour objectifs la caractérisation expérimentale des frottements saccadés dans les matériaux granulaires modèles constitués des billes de verre monodisperses en compression triaxiale drainée et l'identification des paramètres de contrôle. Cinq paramètres macroscopiques caractérisent ces frottements saccadés : la chute de déviateur et la contraction volumique, l'intermittence de déformation axiale, le ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | French |
| العلاقة: | NNT: 2011ISAL0062; tel-00743550; https://theses.hal.science/tel-00743550Test; https://theses.hal.science/tel-00743550/documentTest; https://theses.hal.science/tel-00743550/file/these.pdfTest |
| الإتاحة: | https://theses.hal.science/tel-00743550Test https://theses.hal.science/tel-00743550/documentTest https://theses.hal.science/tel-00743550/file/these.pdfTest |
| حقوق: | info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.78147FAE |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |