Implicit integration of a generalized plasticity constitutive model for partially saturated soil

H. W. Zhang, O. M. Heeres, R. De Borst, B. A. Schrefler

Research output: Contribution to journalArticle

37 Scopus citations

Abstract

Extends the stress update algorithm and the tangent operator recently proposed for generalized plasticity by De Borst and Heeres to the case of partially saturated soils, where on top of the hydrostatic and deviatoric components of the (effective) stress tensor suction has to be considered as a third independent variable. The soil model used for the applications is the Bolzon-Schrefler-Zienkiewicz model, which is an extension of the Pastor-Zienkiewicz model to partial saturation. The algorithm is incorporated in a code for partially saturated soil dynamics. Back calculation of a saturation test and simulation of surface subsidence above an exploited gas reservoir demonstrate the advantage of the proposed algorithm in terms of iteration convergence of the solution.

Original languageEnglish (US)
Pages (from-to)314-336
Number of pages23
JournalEngineering Computations (Swansea, Wales)
Volume18
Issue number1-2
DOIs
StatePublished - Jan 1 2001

Keywords

  • Plasticity
  • Soil
  • Stress

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Applied Mathematics
  • Computational Theory and Mathematics
  • Computer Science Applications
  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering

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