Viscoplastic regularization of strain localization in fluid-saturated porous media

Maria Lazari, Lorenzo Sanavia, Bernhard A. Schrefler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

In this paper, viscoplasticity is adopted as regularization technique to avoid the mesh sensitivity problem in strain localization simulation of multiphase geomaterials in quasi-static and isothermal conditions. Drucker-Prager yield surface with isotropic linear hardening/softening and non-associated plastic flow is used for simplicity. The regularizing effect of viscoplastic model is analyzed by numerical simulation of an undrained plane strain biaxial compression test on initially water saturated dense sand. Mesh sensitivity is examined by using different spatial discretization and the results denote the crucial influence of the loading velocity on the viscous regularization of quasi-static process.

Original languageEnglish (US)
Title of host publication11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014
PublisherInternational Center for Numerical Methods in Engineering
Pages3495-3503
Number of pages9
ISBN (Print)9788494284472
StatePublished - Jul 1 2014
EventJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014 - Barcelona, Spain
Duration: Jul 20 2014Jul 25 2014

Other

OtherJoint 11th World Congress on Computational Mechanics, WCCM 2014, the 5th European Conference on Computational Mechanics, ECCM 2014 and the 6th European Conference on Computational Fluid Dynamics, ECFD 2014
CountrySpain
CityBarcelona
Period7/20/147/25/14

Keywords

  • Drucker-Prager
  • Multiphase porous materials
  • Quasi-static loading
  • Strain localization
  • Viscoplastic regularization

ASJC Scopus subject areas

  • Mechanics of Materials
  • Computational Theory and Mathematics
  • Computer Science Applications
  • Mechanical Engineering

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