Multiphase analysis of strain localization with regularized models

Maria Lazari, Lorenzo Sanavia, Bernhard A. Schrefler

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

1 Scopus citations

Abstract

In this paper rate-dependent plasticity is employed to regularize, from the scope of mesh independency, the numerical solution in strain localization process of multiphase geomaterials. Towards this goal, an already existing model for multiphase porous media is enhanced with local and non-local elasto-viscoplasticity to obtain mesh insensitive results even in case of weakly rate-sensitive materials where artificial viscosities are needed for the regularization of the numerical solution. The numerical validation and analysis of the regularization properties of both viscoplastic models is illustrated by simulating numerical examples from the geomechanics field like a biaxial strain localization test and a slope stability problem.

Original languageEnglish (US)
Title of host publicationProceedings of the 4th International Conference on Particle-Based Methods - Fundamentals and Applications, PARTICLES 2015
PublisherInternational Center for Numerical Methods in Engineering
Pages149-160
Number of pages12
ISBN (Print)9788494424472
StatePublished - 2015
Event4th International Conference on Particle-Based Methods, PARTICLES 2015 - Barcelona, Spain
Duration: Sep 28 2015Sep 30 2015

Other

Other4th International Conference on Particle-Based Methods, PARTICLES 2015
CountrySpain
CityBarcelona
Period9/28/159/30/15

Keywords

  • Multiphase porous media
  • Non-local approach
  • Strain localization
  • Viscoplasticity

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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