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Use of the iterative solution method for coupled finite element and boundary element modeling; Yucca Mountain Site Characterization Project

Description: Tunnels buried deep within the earth constitute an important class geomechanics problems. Two numerical techniques used for the analysis of geomechanics problems, the finite element method and the boundary element method, have complementary characteristics for applications to problems of this type. The usefulness of combining these two methods for use as a geomechanics analysis tool has been recognized for some time, and a number of coupling techniques have been proposed. However, not all of th… more
Date: July 1, 1993
Creator: Koteras, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Solution of problems with material nonlinearities with a coupled finite element/boundary element scheme using an iterative solver. Yucca Mountain Site Characterization Project

Description: The prediction of stresses and displacements around tunnels buried deep within the earth is an important class of geomechanics problems. The material behavior immediately surrounding the tunnel is typically nonlinear. The surrounding mass, even if it is nonlinear, can usually be characterized by a simple linear elastic model. The finite element method is best suited for modeling nonlinear materials of limited volume, while the boundary element method is well suited for modeling large volumes of… more
Date: January 1, 1996
Creator: Koteras, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A computational model for three-dimensional jointed media with a single joint set; Yucca Mountain Site Characterization Project

Description: This report describes a three-dimensional model for jointed rock or other media with a single set of joints. The joint set consists of evenly spaced joint planes. The normal joint response is nonlinear elastic and is based on a rational polynomial. Joint shear stress is treated as being linear elastic in the shear stress versus slip displacement before attaining a critical stress level governed by a Mohr-Coulomb faction criterion. The three-dimensional model represents an extension of a two-dim… more
Date: February 1, 1994
Creator: Koteras, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

An analysis of a joint shear model for jointed media with orthogonal joint sets; Yucca Mountain Site Characterization Project

Description: This report describes a joint shear model used in conjunction with a computational model for jointed media with orthogonal joint sets. The joint shear model allows nonlinear behavior for both joint sets. Because nonlinear behavior is allowed for both joint sets, a great many cases must be considered to fully describe the joint shear behavior of the jointed medium. An extensive set of equations is required to describe the joint shear stress and slip displacements that can occur for all the vario… more
Date: October 1, 1991
Creator: Koteras, J.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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