Sometimes it is difficult to choose the most appropriate failure criterion for problem analyzed. For brittle materials, attention must be paid availability of experimental data and calibration representative parameters, within chosen criterion. The work herein presented, starting with an overview on machromechanical criteria, analysed in Haigh-Westergaard Stress Space, investigates suitability ...

This paper presents a three-dimensional slope stability limit equilibrium solution for translational planar failure modes. The proposed uses Bishop’s average skeleton stress combined with the Mohr–Coulomb criterion to describe soil strength evolution under unsaturated conditions while its formulation ensures natural and smooth transition from saturated regime vice versa. analytical is evaluated...

The purpose of this paper is to study the solutions to the Signorini problem with Coulomb friction (the so-called Coulomb problem). Some optimal a priori estimates are given and a uniqueness criterion is exhibited. Recently, nonuniqueness examples have been presented in the continuous framework. It is proven, here, that if a solutions satisfies a certain hypothesis on the tangential displacemen...

In this research, the variation of ultimate bearing capacity, failure mechanism and deformation pattern of soil beneath two closely square footings have been studied using numerical methods. It is assumed that the adjacent footings are constructed on the surface of sand. The presented numerical analyses are based on explicit-finite-difference code, FLAC3D. The elasto-plastic behavior of soil is...

The development of accurate theoretical failure, fatigue, and wear models for ultra-high molecular weight polyethylene (UHMWPE) is an important step towards better understanding the micromechanisms of the surface damage that occur in load bearing orthopaedic components and improving the lifetime of joint arthoplasties. Previous attempts to analytically predict the clinically observed damage, we...

naturally occurred soil deposits inherit heterogeneity and anisotropy in their strength properties. the main purpose of this paper is to model the soil stratum with anisotropy consideration and spatially varying undrained shear strength by using random field theory coupled with finite difference numerical analysis to evaluate their effect on the bearing capacity of the shallow foundations. in t...