Micro-scale modeling of the inelastic response of a granular sandstone

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

1 Citation (Scopus)

Abstract

This paper discusses a new computational strategy for the analysis of inelastic processes in granular rocks subjected to varying levels of confinement. The purpose is to provide a flexible and efficient tool for the analysis of failure processes in geomechanical settings. The proposed model is formulated in the framework of Lattice Discrete Particle Models (LDPM), which is here calibrated to capture the behavior of a high-porosity rock widely tested in the literature: Bleurswiller sandstone. The procedure required to generate a realistic granular microstructure is described. Then, the micromechanical parameters controlling the fracture response at low confinements, as well as the plastic behavior at high pressures have been calibrated. It is shown that the LDPM model allows one to explore the effect of fine-scale heterogeneity on the inelastic response of rock cores, achieving a satisfactory quantitative performance across a wide range of stress conditions. The results suggest that LDPM analyses represent a versatile tool for the characterization and simulation of the mechanical response of granular rocks, which can assist the interpretation of complex deformation/failure patterns, as well as the development of continuum models capturing the effect of micro-scale heterogeneity.

Original languageEnglish (US)
Title of host publication49th US Rock Mechanics / Geomechanics Symposium 2015
PublisherAmerican Rock Mechanics Association (ARMA)
Pages2881-2886
Number of pages6
Volume4
ISBN (Electronic)9781510810518
StatePublished - Jan 1 2015
Event49th US Rock Mechanics / Geomechanics Symposium - San Francisco, United States
Duration: Jun 29 2015Jul 1 2015

Other

Other49th US Rock Mechanics / Geomechanics Symposium
CountryUnited States
CitySan Francisco
Period6/29/157/1/15

Fingerprint

sandstones
Sandstone
sandstone
Rocks
rocks
modeling
rock
microstructure
plastics
Porosity
plastic
porosity
Plastics
continuums
Microstructure
simulation
particle

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology

Cite this

Esna Ashari, S., Buscarnera, G., & Cusatis, G. (2015). Micro-scale modeling of the inelastic response of a granular sandstone. In 49th US Rock Mechanics / Geomechanics Symposium 2015 (Vol. 4, pp. 2881-2886). American Rock Mechanics Association (ARMA).
Esna Ashari, S. ; Buscarnera, Giuseppe ; Cusatis, Gianluca. / Micro-scale modeling of the inelastic response of a granular sandstone. 49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4 American Rock Mechanics Association (ARMA), 2015. pp. 2881-2886
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Esna Ashari, S, Buscarnera, G & Cusatis, G 2015, Micro-scale modeling of the inelastic response of a granular sandstone. in 49th US Rock Mechanics / Geomechanics Symposium 2015. vol. 4, American Rock Mechanics Association (ARMA), pp. 2881-2886, 49th US Rock Mechanics / Geomechanics Symposium, San Francisco, United States, 6/29/15.

Micro-scale modeling of the inelastic response of a granular sandstone. / Esna Ashari, S.; Buscarnera, Giuseppe; Cusatis, Gianluca.

49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4 American Rock Mechanics Association (ARMA), 2015. p. 2881-2886.

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

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N2 - This paper discusses a new computational strategy for the analysis of inelastic processes in granular rocks subjected to varying levels of confinement. The purpose is to provide a flexible and efficient tool for the analysis of failure processes in geomechanical settings. The proposed model is formulated in the framework of Lattice Discrete Particle Models (LDPM), which is here calibrated to capture the behavior of a high-porosity rock widely tested in the literature: Bleurswiller sandstone. The procedure required to generate a realistic granular microstructure is described. Then, the micromechanical parameters controlling the fracture response at low confinements, as well as the plastic behavior at high pressures have been calibrated. It is shown that the LDPM model allows one to explore the effect of fine-scale heterogeneity on the inelastic response of rock cores, achieving a satisfactory quantitative performance across a wide range of stress conditions. The results suggest that LDPM analyses represent a versatile tool for the characterization and simulation of the mechanical response of granular rocks, which can assist the interpretation of complex deformation/failure patterns, as well as the development of continuum models capturing the effect of micro-scale heterogeneity.

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Esna Ashari S, Buscarnera G, Cusatis G. Micro-scale modeling of the inelastic response of a granular sandstone. In 49th US Rock Mechanics / Geomechanics Symposium 2015. Vol. 4. American Rock Mechanics Association (ARMA). 2015. p. 2881-2886