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JournalISSN: 0363-9061

International Journal for Numerical and Analytical Methods in Geomechanics 

Wiley-Blackwell
About: International Journal for Numerical and Analytical Methods in Geomechanics is an academic journal published by Wiley-Blackwell. The journal publishes majorly in the area(s): Finite element method & Constitutive equation. It has an ISSN identifier of 0363-9061. Over the lifetime, 3253 publications have been published receiving 103818 citations. The journal is also known as: Numerical and analytical methods in geomechanics.


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Journal ArticleDOI
TL;DR: In this article, the basic equations of motion for porous media were established by Biot and despite many subsequent re-derivations, are, with minor modifications, relevant today, however, some changes of variables and approximations are on occasion useful, and their relative efficiency of solution in the numerical context is discussed.
Abstract: The basic equations of motion for porous media were established by Biot and despite many subsequent rederivations, are, with minor modifications, relevant today. However, some changes of variables and approximations are on occasion useful, and this paper discusses the alternative forms available and their relative efficiency of solution in the numerical context. Here penaity methods prove once again useful. The paper is illustrated with examples covering phenomena of different periods ranging froms hock excitation to slow consolidation which are treated in a single unified program.

901 citations

Journal ArticleDOI
TL;DR: In this article, a technique for computing lower bound limit loads in soil mechanics under conditions of plane strain is described, where a perfectly plastic soil model is assumed, which may be either purely cohesive or cohesive-frictional, together with an associated flow rule.
Abstract: This paper describes a technique for computing lower bound limit loads in soil mechanics under conditions of plane strain. In order to invoke the lower bound theorem of classical plasticity theory, a perfectly plastic soil model is assumed, which may be either purely cohesive or cohesive-frictional, together with an associated flow rule. Using a suitable linear approximation of the yield surface, the procedure computes a statically admissible stress field via finite elements and linear programming. The stress field is modelled using linear 3-noded traingles and statically admissible stress discontinuities may occur at the edges of each triangle. Imposition of the stress-boundary, equilibrium and yield conditions leads to an expression for the collapse load which is maximized subject to a set of linear constraints on the nodal stresses. Since all of the requirements for a statically admissible solution are satisfied exactly (except for small round-off errors in the optimization computations), the solution obtained is a strict lower bound on the true collapse load and is therefore ‘safe’. A major drawback of the technique, as first described by Lysmer,1 is the large amount of computer time required to solve the linear programming problem. This paper shows that this limitation may be avoided by using an active set algorithm, rather than the traditional simplex or revised simplex strategies, to solve the resulting optimization problem. This is due to the nature of the constraint matrix, which is always very sparse and typically has many more rows that columns. It also proved that the procedure can, without modification, be used to derive strict lower bounds for a purely cohesive soil which has increasing strength with depth. This important class of problem is difficult to tackle using conventional methods. A number of examples are given to illustrate the effectiveness of the procedure.

613 citations

Journal ArticleDOI
TL;DR: In this article, a thin solid element, called a thin-layer element, was proposed for soil-structure interaction and rock joints, and a special constitutive model was used and various deformation modes such as no slip, slip, debonding and rebonding were incorporated.
Abstract: The idea of using a thin solid element, called a thin-layer element, in soil-structure interaction and rock joints is proposed. A special constitutive model is used and various deformation modes such as no slip, slip, debonding and rebonding are incorporated. The shear stiffness is found from special laboratory tests and the normal stiffness is assumed to be composed of participation of the thin-layer element and the adjoining solid elements. A parametric study shows that the thickness of the thin-layer element can be such that the ratio of thickness to (mean) dimension of the adjacent element is in the range of 0.01 to 0.1. A number of simple and practical problems are solved to illustrate the success of the thin-layer element for soil-structure interaction problems.

563 citations

Journal ArticleDOI
TL;DR: In this article, the authors present a Web of Science Record created on 2006-11-09, modified on 2017-11 -27, with a new record set on 11-27-2017.
Abstract: Note: Sols Reference LMS-ARTICLE-2006-008doi:10.1002/nag.499View record in Web of Science Record created on 2006-11-09, modified on 2017-11-27

547 citations

Journal ArticleDOI
TL;DR: In this paper, the authors outline the theory of generalized plasticity in which yield and plastic potential surfaces need not be explicitly defined, and show how a very effective general model describing the behaviour of sands and of clays under monotonic or transient loading can be developed.
Abstract: The paper outlines the theory of generalized plasticity in which yield and plastic potential surfaces need not be explicitly defined, and shows how a very effective general model describing the behaviour of sands and of clays under monotonic or transient loading can be developed. The model is currently one of the simplest and yet one of the most effective ones for describing the full range of behaviour. The hierarchical structure of the model limits the number of parameters which have to be experimentally determined for a given material to those strictly necessary for the problem at hand. A discussion of currently used models is included.

537 citations

Performance
Metrics
No. of papers from the Journal in previous years
YearPapers
202396
2022166
2021141
2020121
2019129
2018103