Fracture shearing of polycrystalline material simulations using the material point method
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40571_2020_327_ReferencePDF.pdf
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2.14 MB
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Checksum (MD5)
ee897a6e622986f7f0c831d93242c16e
Author(s)
Raymond, Samuel J.
Jones, Bruce D.
Williams, John R.
Date Issued
March 12, 2020
Publisher
Springer International Publishing
Version
Author's final manuscript
Abstract
Abstract
In this work, we present a newly developed workflow to study the combined effect of shear and normal stresses upon a preexisting fracture plane. This workflow is used to study the behavior of both single grain and polycrystalline materials, with varying material properties. The surface roughness and aperture of preexisting fractures are highly dependent upon the dynamic stress behavior within rock formations. Due to shear slippage, or variation in normal stress, a preexisting fracture may become more or less conductive, leading to changes in effective porosity, where such changes are caused by purely elastic deformation, plastic deformation, material failure, or a combination thereof. The numerical modeling framework demonstrated herein is based upon the meshless material point method (MPM). In using MPM, the workflow can capture large deformations due to applied shear and normal stresses. Additionally, no special geometric treatment is required at the point of contact between fracture surfaces. Models involving purely elastic, single-grain materials, as well as more complex, plastic, polycrystalline bodies, are presented, highlighting the flexibility of the proposed approach.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Creative Commons Attribution-Noncommercial-Share Alike
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1007/s40571-020-00327-4
