Abstract
Locking phenomena and pressure oscillations are often associated with the use of low order elements to simulate incompressible or dilatant behavior, typical of geomechanical applications. A stabilized Galerkin Least-Squares formulation (GLS), along the lines advocated by Hughes et al (1986) for fluid mechanics, is extended in this paper to a mixed displacement-pressure formulation of elastoplasticity. Applications in geomechanics demonstrate that the proposed formulation provides an appropriate and general solution to overcome locking phenomena.
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