Simulation of emergent compaction banding fronts caused by frictional boundaries

G. Shahin, G. Buscarnera

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This study examines the role of boundary friction in promoting heterogeneous compaction in soft rock specimens loaded at high confining pressure outside the domain of compaction localisation. An elastoplastic constitutive model characterised by tunable hardening/softening behaviour is used to conduct the analyses. Finite-element simulations suggest that material instability is a non-necessary condition for the emergence of compaction fronts. Such fronts propagated as a result of a severe deviation in the local responses induced by frictional constraints. These findings suggest that boundary effects can bias the assessment of the extent of the compaction localisation domain. Experimental countermeasures and informed model calibration procedures are therefore necessary to minimise such bias and enable more accurate predictions of soft rock compaction.

Original languageEnglish (US)
Pages (from-to)436-444
Number of pages9
JournalGeotechnique Letters
Volume10
Issue number3
DOIs
StatePublished - Sep 1 2020

Keywords

  • compaction
  • numerical modelling
  • rocks/rock mechanics

ASJC Scopus subject areas

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

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