A thermomechanical anisotropic continuum model for geological materials with multiple joint sets
Abstract
Summary Joints in geological materials introduce elastic compliance and weak planes on which sliding can occur. Although these materials can have multiple joint sets, they often have preferred orientations that cause both elastic and inelastic anisotropic response even when the unjointed material is isotropic. Azimuthal variations in radial velocity and polarity of tangential motion have been observed in experimental data for wave propagation caused by an initially spherical source in a geological material with multiple joint sets. This observed tangential ground motion was found to be related to mechanical anisotropy caused by preferred orientations of joints in the rock. This paper describes thermomechanical continuum constitutive equations, which model the effects of multiple persistent joint sets. A number of quasi‐static examples are considered, which show that the proposed model predicts anisotropic effects of sliding on multiple joint sets similar to those exhibited by computationally expensive mesoscale calculations, which model joint sets explicitly.
- Authors:
-
[1];
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Technion-Israel Institute of Technology, Haifa (Israel)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1513835
- Alternate Identifier(s):
- OSTI ID: 1436814
- Report Number(s):
- LLNL-JRNL-746369
Journal ID: ISSN 0363-9061; 930314
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Accepted Manuscript
- Journal Name:
- International Journal for Numerical and Analytical Methods in Geomechanics
- Additional Journal Information:
- Journal Volume: 42; Journal Issue: 12; Journal ID: ISSN 0363-9061
- Publisher:
- Wiley
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; anisotropic plasticity; jointed rock; mesoscale simulations; thermomechanical model
Citation Formats
Vorobiev, O. Yu., and Rubin, M. B. A thermomechanical anisotropic continuum model for geological materials with multiple joint sets. United States: N. p., 2018.
Web. doi:10.1002/nag.2795.
Vorobiev, O. Yu., & Rubin, M. B. A thermomechanical anisotropic continuum model for geological materials with multiple joint sets. United States. https://doi.org/10.1002/nag.2795
Vorobiev, O. Yu., and Rubin, M. B. Thu .
"A thermomechanical anisotropic continuum model for geological materials with multiple joint sets". United States. https://doi.org/10.1002/nag.2795. https://www.osti.gov/servlets/purl/1513835.
@article{osti_1513835,
title = {A thermomechanical anisotropic continuum model for geological materials with multiple joint sets},
author = {Vorobiev, O. Yu. and Rubin, M. B.},
abstractNote = {Summary Joints in geological materials introduce elastic compliance and weak planes on which sliding can occur. Although these materials can have multiple joint sets, they often have preferred orientations that cause both elastic and inelastic anisotropic response even when the unjointed material is isotropic. Azimuthal variations in radial velocity and polarity of tangential motion have been observed in experimental data for wave propagation caused by an initially spherical source in a geological material with multiple joint sets. This observed tangential ground motion was found to be related to mechanical anisotropy caused by preferred orientations of joints in the rock. This paper describes thermomechanical continuum constitutive equations, which model the effects of multiple persistent joint sets. A number of quasi‐static examples are considered, which show that the proposed model predicts anisotropic effects of sliding on multiple joint sets similar to those exhibited by computationally expensive mesoscale calculations, which model joint sets explicitly.},
doi = {10.1002/nag.2795},
journal = {International Journal for Numerical and Analytical Methods in Geomechanics},
number = 12,
volume = 42,
place = {United States},
year = {Thu May 10 00:00:00 EDT 2018},
month = {Thu May 10 00:00:00 EDT 2018}
}
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Cited by: 6 works
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Figures / Tables:
Table 1: Parameters for the isotropic model for the rock in the mesoscale simulations.
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Figures / Tables found in this record:
Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.