A kinematic hardening soil model considering the principal stress rotation

Yunming Yang, Hai Sui Yu

Research output: Journal PublicationArticlepeer-review

46 Citations (Scopus)

Abstract

SUMMARY: In this article, a typical and representative kinematic hardening soil model is first studied to investigate its capabilities to reproduce soil responses under principal stress rotations (PSR). It is found that the model is capable of reproducing the non-coaxiality very well. It can qualitatively capture the trends of responses of different stress and strain components, without the capability to quantitatively reproduce these responses. Its prediction of volumetric responses is the poorest and can give wrong results in many cases. The underlying reasons for these capabilities and defects are analyzed in detail. The model is subsequently modified to better take into account the PSR influences. An additional new flow rule and plastic modulus for the PSR are developed. One important feature of the model is that it is developed in the general stress space with six stress variables. Therefore, it can take into account multiple PSRs at different directions. Another feature is that it retains the linear stress rate-strain rate relationship, which facilitates its numerical implementations. In addition, the universal characteristic of the theory makes it equally applicable to other kinematic hardening models.

Original languageEnglish
Pages (from-to)2106-2134
Number of pages29
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Volume37
Issue number13
DOIs
Publication statusPublished - Sep 2013

Keywords

  • Elastoplastic model
  • Non-coaxiality
  • Principal stress rotation

ASJC Scopus subject areas

  • Computational Mechanics
  • Materials Science (all)
  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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