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Stress rate-elastic stretching relations in elastoplastic constitutive equations for soils

Abstract:

This discussion paper emphasizes the importance of the First Law of Thermodynamics in description of elastic component of elasto-plastic behaviour of soils. To ensure that the First Law is satisfied, existence of energy potential should be assumed. Then the incremental elastic stress-strain relationship is easily derived by double differentiation of this potential. However, when this energy potential is also made dependent on plastic strains, derivation of incremental elastic stress-strain relationship becomes subtler. The authors are to be congratulated on their attempt to introduce thermomechanical principles into soil modelling, yet they seem to overlook this subtlety.

Authors:

Einav, I. and Puzrin, Alexander

Index Terms:

geomechanics; GeomechanicsGroup; Einav, I.; Puzrin, Alexander

Remarks:

Discussion on Hashiguchi K. & Collins I.

Further Information:

Date published: 2002