Evaluating the Performance of an ISA-Hypoplasticity Constitutive Model on Problems with Repetitive Loading

  • William Fuentes
  • Theodoros Triantafyllidis
  • Carlos Lascarro
Chapter

Abstract

The ISA-plasticity is a useful theory to propose constitutive models for soils accounting for small strain effects. It uses the intergranular strain concept, previously proposed by Niemunis and Herle (1997) to enhance the capabilities of some existing hypoplastic models under cyclic loading. In contrast to its predecessor, the ISA-plasticity presents a completely different formulation to incorporate an elastic locus depending on a strain amplitude. However, it keeps similar advantages and brings other new ones such as the elastic locus and improved simulations of the plastic accumulation upon a number of cycles. In the present article, some numerical investigations are made to evaluate the performance of an ISA-plasticity based model on simulations with repetitive loading. We have chosen to couple the ISA-plasticity with the hypoplastic model by Wolfferdorff to simulate some experiments. At the beginning of the article, the theory of the ISA-plasticity is briefly explained. Subsequently, its numerical implementation is step by step detailed. A semi-explicit algorithm is proposed and some hints are given to allow the coupling with other models. At the end, some simulations of experiments with the Karlsruhe fine sand are shown in which the performance of the model under repetitive loading is evaluated. The behavior of the plastic accumulation is examined upon a number of cycles and some remarks are given about the current investigation.

Keywords

ISA model Plastic accumulation Repetitive loading Hypoplasticity 

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Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • William Fuentes
    • 1
  • Theodoros Triantafyllidis
    • 2
  • Carlos Lascarro
    • 1
  1. 1.University del NorteBarranquillaColombia
  2. 2.Institute of Soil Mechanics and Rock MechanicsKarlsruhe Institute of TechnologyKarlsruheGermany

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