a 3d elasto-plastic fem program developed for reservoir geomechanics simulations: introduction and case studies

A 3D elasto-plastic FEM program developed for reservoir Geomechanics simulations: Introduction and case studies

The development of yielded or failure zone due to an engineering construction is a subject of study in different disciplines. In Petroleum engineering, depletion from and injection of gas into a porous rock can cause development of a yield zone around the reservoir. Studying this phenomenon requires elasto-plastic analysis of geomaterial, in this case the porous rocks. In this study, which is a...

Technical Feature 3D FEM and EM Simulations for DRFs

Three-dimensional (3D) fullwave analysis of a microwave dielectric resonator filter (DRF) in a rectangular metallic enclosure is presented. By using a 3D finite-element method (FEM) to perform numerical simulations, parameters and predictions that are difficult to measure but actually affect the performance of a microwave DRF can be accurately determined. In the process, a significant phenomeno...

A Short Introduction to Clinical Photography for the Plastic Surgeon

Error estimates for elasto-plastic problems

— Under some reasonable smoothness assumpfions on the displacements, we are able to dérive an error estimate of the form ||a — <7h||L2{fl)^ Ch, for the approximation of the stress field a in some problems in elasto-plasticity. Using the same ideas, we als o find a piecewise line ar approximation of Mosolov's problem, for which we still get an 0 (h) error estimate.

Anisotropic and Dissipative Finite Elasto-plastic Composite

Here we propose a macroscopic model for elasto-plastic composite, characterized by an initial anisotropy, that can evolve during the large plastic deformation. Application to transversely isotropic and orthotropic composites will be also developed. The paper deals with anisotropic finite elasto-plastic 6-models, which accounts for the dissipative nature of the plastic flow, within the construct...

Semi-smooth Newton methods for mixed FEM discretizations of higher-order for frictional, elasto-plastic two-body contact problems

In this acticle a semi-smooth Newton method for frictional two-body contact problems and a solution algorithm for the resulting sequence of linear systems is presented. It is based on a mixed variational formulation of the problem and a discretization by finite elements of higher-order. General friction laws depending on the normal stresses and elasto-plastic material behaviour with linear isot...