Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?

Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur GraphSearch.

Découvrez-en plus sur les applications Graph.

Concept

Shear strength (soil)

Shear strength is a term used in soil mechanics to describe the magnitude of the shear stress that a soil can sustain. The shear resistance of soil is a result of friction and interlocking of particles, and possibly cementation or bonding of particle contacts. Due to interlocking, particulate material may expand or contract in volume as it is subject to shear strains. If soil expands its volume, the density of particles will decrease and the strength will decrease; in this case, the peak strength would be followed by a reduction of shear stress. The stress-strain relationship levels off when the material stops expanding or contracting, and when interparticle bonds are broken. The theoretical state at which the shear stress and density remain constant while the shear strain increases may be called the critical state, steady state, or residual strength. The volume change behavior and interparticle friction depend on the density of the particles, the intergranular contact forces, and t

À propos de ce résultat

Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.

Publications associées

Chargement

Personnes associées

Chargement

Unités associées

Chargement

Concepts associés

Chargement

Cours associés

Chargement

Séances de cours associées

Chargement

Résumé

Source officielle

À propos de ce résultat

Publications associées (100)

Chargement

Afficher plus

Publications associées

Chargement

Personnes associées (15)

Personnes associées

Chargement

Unités associées (9)

Unités associées

Chargement

Concepts associés (10)

Concepts associés

Chargement

Cours associés (25)

Cours associés

Chargement

Séances de cours associées (89)

Séances de cours associées

Chargement

Géotechnique

Dans le groupe des géosciences, la géotechnique est la technoscience consacrée à l’étude pratique de la subsurface terrestre sur laquelle notre action directe est possible pour son aménagement et/ou s

Mécanique des sols

La mécanique des sols est la plus ancienne, la plus connue et la plus pratiquée des branches de la géomécanique, discipline mathématique de la géotechnique, pour l’étude du comportement théorique des

Angle de talus naturel

L'angle de talus naturel est l'angle que fait la pente du tas de matière empilée non tassée et l'horizontale. Il est caractéristique du matériau en œuvre. Il contribue à la description du comporteme

CIVIL-308: Rock mechanics

Les étudiants comprennent le comportement mécanique de la roche intacte, des joints et des massifs rocheux et savent déterminer les facteurs influençant un projet. Ils savent utiliser les méthodes appropriées pour analyser et dimensionner l'excavation et le soutènement des ouvrages souterrains.

CIVIL-402: Geomechanics

The course aims at providing future civil engineers with the knowledge of geomechanics for professional practice. It addresses, among others, the main stress-strain constitutive models within the context of elasticity and elasto-plasticity and the estimation methods of the lateral earth pressure.

ME-628: High Strain Rate Mechanics of Materials

This course offers fundamentals concepts of material behavior under dynamic loads such as impact and shock. lt will cover experimental methods and analytical modeling approaches to describe the dynamic deformation behavior of metals, ceramics and polymeric materials.

Characterization of the Parameters that Govern the Peak Shear Strength

Giovanni Grasselli

2001

Chargement

A Discrete Element Model for Predicting Shear Strength and Degradation of Rock Joint by Using Compressive and Tensile Test Data

Tohid Kazerani, Jian Zhao

A discrete element model is proposed to examine rock strength and failure. The model is implemented by UDEC, which is developed for this purpose. The material is represented as a collection of irregular-sized deformable particles interacting at their cohesive boundaries. The interface between two adjacent particles is viewed as a flexible contact whose constitutive law controls the material fracture and fragmentation properties. To reproduce rock anisotropy, an orthotropic cohesive law is developed for the contacts, which allows their shear and tensile behaviors to be different from each other. Using a combination of original closed-form expressions and statistical calibrations, a unique set of the contact microparameters are found based on the uniaxial/triaxial compression and Brazilian tension test data of a plaster. Applying the obtained microparameters, joint specimens, made of the same plaster, are simulated, where the comparison of the obtained results to laboratory data shows a reasonable agreement.

Springer Vienna2012

Chargement

, ,

In order to investigate the micro-process and inner mechanism of rock failure under impact loading, the laboratory tests were carried out on an improved split Hopkinson pressure bar (SHPB) system with synchronized measurement devices including a high-speed camera and a dynamic strain meter. The experimental results show that the specimens were in the state of good stress equilibrium during the post failure stage even when visible cracks were forming in the specimens. Rock specimens broke into strips but still could bear the external stress and keep force balance. Meanwhile, numerical tests with particle flow code (PFC) revealed that the failure process of rocks can be described by the evolution of micro-fractures. Shear cracks emerged firstly and stopped developing when the external stress was not high enough. Tensile cracks, however, emerged when the rock specimen reached its peak strength and played an important role in controlling the ultimate failure during the post failure stage.

Elsevier Science Bv2017

Chargement

Afficher plus