Prediction of Plastic Localization Using MRS‐Lade Model
Publication: Journal of Geotechnical Engineering
Volume 119, Issue 4
Abstract
Conditions for plastic localization, in terms of the possibility for discontinuous bifurcations of the incremental strain rate field, are given for the MRS‐Lade model. The susceptibility to bifurcation is examined along various loading paths for the selected medium dense sand. It is shown that the stress states that are achieved in the conventional triaxial compression (CTC) test are the least susceptible to bifurcation, since there will be no possibility for bifurcation throughout the entire loading history (including hardening and softening regions). Contrasting this behavior, plane strain states (PSA and PSP) admit a possibility for bifurcation already in the hardening regime. Consequently, it is expected that accurate predictions of the global load‐displacement response for specimens loaded under plane strain conditions cannot be obtained at the constitutive level, where it is assumed that the state of deformation is homogeneous.
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Published In
Journal of Geotechnical Engineering
Volume 119 • Issue 4 • April 1993
Pages: 639 - 661
Copyright
Copyright © 1993 American Society of Civil Engineers.
History
Received: Feb 24, 1992
Published online: Apr 1, 1993
Published in print: Apr 1993
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