Memory surface hardening model for granular soils under repeated loading conditions

Riccardo Corti (Lead / Corresponding author), Andrea Diambra, David Muir Wood, Daniella E. Escribano, David F T Nash

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The prediction of the stress-strain response of granular soils under large numbers of repeated loading cycles requires subtle changes to existing models, although the basic framework of kinematic hardening/bounding surface elastoplasticity can be retained. Extending an existing model, an extra memory surface is introduced to track the stress history of the soil. The memory surface can evolve in size and position according to three rules that can be linked with physical principles of particle fabric and interaction. The memory surface changes in size and position through the experienced plastic volumetric strains, but it always encloses the current stress state and the yield surface; these simple rules permit progressive stiffening of the soil in cyclic loading, the accurate prediction of plastic strain rate accumulation during cyclic loading, and the description of slightly stiffer stress-strain response upon subsequent monotonic reloading. The implementation of the additional modeling features requires the definition of only two new constitutive soil parameters. A parametric analysis is provided to show model predictions for drained and undrained cyclic loading conditions. The model is validated against available tests on Hostun sand performed under drained triaxial cyclic loading conditions with various confining pressures, densities, average stress ratios, and cyclic amplitudes.

Original languageEnglish
Article number04016102
Number of pages14
JournalJournal of Engineering Mechanics
Volume142
Issue number12
Early online date22 Sep 2016
DOIs
Publication statusPublished - 1 Dec 2016

Keywords

  • Constitutive relations
  • Cyclic loading
  • Fabric/structure of soils
  • Friction
  • Plasticity
  • Sands

Fingerprint Dive into the research topics of 'Memory surface hardening model for granular soils under repeated loading conditions'. Together they form a unique fingerprint.

  • Cite this