Abstract: Experimental evidence and analyses of results of three-dimensional (3D) tests show that the shape of the failure surface for soils is influenced by the intermediate principal stress, shear banding, and cross anisotropy. ...

Abstract: A constitutive model with a single yield surface has been developed for the behavior of frictional materials, such as clay, sand, concrete, and rock. The model is based on concepts from elasticity and plasticity theories. ...

Abstract: Soils that exhibit nonassociated flow may, according to stability postulates by Drucker and by Hill, become unstable when exposed to certain stress paths inside the failure surface. Series of conventional triaxial tests ...

Abstract: Stability postulates by Drucker and by Hill are applicable to solid metal. When applied to granular material exhibiting nonassociated flow, these concepts of stability imply that the material may be unstable when exposed ...

Abstract: Based on previously obtained experimental results, a mechanistic picture of time effects in granular materials is presented. Accordingly, time effects are caused by grain crushing, which in turn is time dependent, as ...

Abstract: The three‐dimensional, drained stress‐strain and strength behavior of Cambria Sand prepared in cubical specimens with cross‐anisotropic fabric was studied using triaxial compression, plane strain, and cubical triaxial tests ...

Abstract: A series of true triaxial tests have been performed on rectangular prismatic specimens of Santa Monica Beach sand at three different relative densities to study the occurrence of failure, mechanisms that create failure, ...