Extension of a basic hypoplastic model for overconsolidated clays

Shun Wang, Wei Wu, Dichuan Zhang, Jong Ryeol Kim

Research output: Contribution to journalArticle

Abstract

This paper presents a new rate-dependent hypoplastic constitutive model for overconsolidated clays. The model is developed based on a basic hypoplastic model proposed recently for sand. New density and stiffness factors are introduced to account for history dependence. The Matsuoka-Nakai failure surface is incorporated for the limit stress criterion. With six constitutive parameters, the model is capable of predicting the hardening/softening, shear dilation/contraction, and asymptotic state for overconsolidated clays. Comparison between numerical predictions and experimental results shows this model can properly describe the main features of both reconstituted and undisturbed clays with different overconsolidation ratios.

Original languageEnglish
Article number103486
JournalComputers and Geotechnics
Volume123
DOIs
Publication statusPublished - Jul 2020

Keywords

  • Asymptotic state boundary surface
  • Critical state
  • Hypoplastic model
  • Overconsolidation ratio
  • Response envelope

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

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