Fabric-enriched Continuum Breakage Mechanics (F-CBM)

Xianda Shen, Giuseppe Buscarnera*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A Fabric-enriched Continuum Breakage Mechanics (F-CBM) framework is developed to examine the relation between elastic and inelastic anisotropy in granular materials subjected to high pressure. For this purpose, emphasis is given to the influence of the anisotropic fabric on the plastic cap regime, i.e., a macroscopic signature of the inelasticity of granular materials widely dependent on the particle crushability. Anisotropic behaviour prior to yielding is introduced through a symmetric second-order fabric tensor embedded in the expression of the elastic energy potential. It is shown that, thanks to its energy-based formulation, the F-CBM framework provides a platform to predict the rotation and distortion of the yield cap of granular materials as an outcome of anisotropic strain energy storage prior to grain crushing. Parametric analyses indicate that both the degree of anisotropy and the orientation of the fabric impact the energy release resulting from grain crushing and contribute to the resulting stress-strain behaviour. It is shown that, despite the use of very few parameters, the proposed framework can accurately predict the anisotropic yielding and inelastic stress-strain response solely on the basis of the directional properties inferred from measurements of elastic anisotropy.

Original languageEnglish (US)
JournalGeotechnique
DOIs
StateAccepted/In press - 2022

Keywords

  • anisotropy
  • constitutive relations
  • fabric/structure of soils
  • particle crushing/crushability

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

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