Compaction localization in granular rocks: Modeling grain-size effects

F. Marinelli, Y. D. Zhang, G. Buscarnera

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

This paper focuses on the simulation of localized compaction in granular rocks. For this purpose, a continuum framework referred to as Breakage Mechanics is used to capture the role of microscopic crushing on the mechanical response of grain assemblies. In particular, grain size dependencies are introduced by connecting the physics of grain-scale fracture to the energetics of collective crushing. It is shown that this approach enables the simultaneous consideration of changes in grain sorting and average grain size, where the role of the latter is modeled via central splitting and contact fracture laws. Using this constitutive framework, the localization potential of Bentheim sandstone has been studied with the purpose to emphasize the role of grain scale characteristics in the inception of compaction banding. The analyses show that the model captures correctly the increase of the localization potential resulting from a coarser gradation or a narrow grain size distribution.

Original languageEnglish (US)
Title of host publication51st US Rock Mechanics / Geomechanics Symposium 2017
PublisherAmerican Rock Mechanics Association (ARMA)
Pages2107-2115
Number of pages9
ISBN (Electronic)9781510857582
StatePublished - Jan 1 2017
Event51st US Rock Mechanics / Geomechanics Symposium 2017 - San Francisco, United States
Duration: Jun 25 2017Jun 28 2017

Publication series

Name51st US Rock Mechanics / Geomechanics Symposium 2017
Volume3

Other

Other51st US Rock Mechanics / Geomechanics Symposium 2017
CountryUnited States
CitySan Francisco
Period6/25/176/28/17

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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  • Cite this

    Marinelli, F., Zhang, Y. D., & Buscarnera, G. (2017). Compaction localization in granular rocks: Modeling grain-size effects. In 51st US Rock Mechanics / Geomechanics Symposium 2017 (pp. 2107-2115). (51st US Rock Mechanics / Geomechanics Symposium 2017; Vol. 3). American Rock Mechanics Association (ARMA).