Numerical simulations of localized deformation in a high-porosity carbonate rock

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

Abstract

Strain localization in the form of compactive shear bands or compaction bands is often observed in high porosity rocks such as sandstones or limestones. In the present study, we theoretically investigate the possibility of strain localization in a high-porosity carbonate rock (calcarenite) by means of a continuum mechanics approach. A critical state elasto-plastic constitutive model has been employed for this purpose. We examine the constitutive and structural response by solving boundary value problems (BVPs) for calcarenite specimens subjected to axisymmetric loading conditions. In order to perform the numerical simulation in the post localization regime, the model is enhanced with a rate dependent regularization scheme. The results demonstrate that material heterogeneity, kinematic constraints and boundary effects govern the formation of various modes of localized deformation in the transitional regime between brittle fracture and ductile faulting. Indeed, the predicted macroscopic response is found to be in good agreement with observations available in the literature.

Original languageEnglish (US)
Title of host publication48th US Rock Mechanics / Geomechanics Symposium 2014
EditorsRay Sterling, Emmanuel Detournay, Will Pettitt, Joseph F. Labuz, Lee Petersen
PublisherAmerican Rock Mechanics Association (ARMA)
Pages200-207
Number of pages8
ISBN (Electronic)9781634395236
StatePublished - Jan 1 2014
Event48th US Rock Mechanics / Geomechanics Symposium 2014: Rock Mechanics Across Length and Time Scales - Minneapolis, United States
Duration: Jun 1 2014Jun 4 2014

Publication series

Name48th US Rock Mechanics / Geomechanics Symposium 2014
Volume1

Conference

Conference48th US Rock Mechanics / Geomechanics Symposium 2014: Rock Mechanics Across Length and Time Scales
CountryUnited States
CityMinneapolis
Period6/1/146/4/14

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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