HIERARCHICAL APPROACH FOR CONSTITUTIVE MODELLING OF GEOLOGIC MATERIALS.

C. S. Desai, S. Somasundaram, George N Frantziskonis

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Abstract

A hierarchical concept is proposed for the development of constitutive models to account for various factors that influence behavior of (geologic) materials. It permits evolution of models of progressively higher grades from the basic model representing isotropic hardening with associative behavior. Factors such as non-associativeness and induced anisotropy due to friction and cyclic loading, and softening are introduced as corrections or perturbations to the basic model. The influence of these factors is captured through non-associativeness manifested by deviation from normality of the plastic strain increments to the yield surface, F. Details of four models: isotropic hardening with associative behavior, isotropic hardening with non-associative behavior, general anisotropic hardening and strain-softening with a damage variable are presented.

Original languageEnglish (US)
Pages (from-to)225-257
Number of pages33
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Volume10
Issue number3
Publication statusPublished - May 1986

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ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computational Mechanics
  • Mechanics of Materials
  • Materials Science(all)
  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

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