Lucille Carbillet
The Influence of Grain Size Distribution on Mechanical Compaction and Compaction Localization in Porous Rocks
Carbillet, Lucille; Heap, Michael J.; Baud, Patrick; Wadsworth, Fabian B.; Reuschlé, Thierry
Authors
Michael J. Heap
Patrick Baud
Dr Fabian Wadsworth fabian.b.wadsworth@durham.ac.uk
Associate Professor
Thierry Reuschlé
Abstract
The modes of formation of clastic rocks result in a wide variety of microstructures, from poorly-sorted heterogeneous rocks to well-sorted and nominally homogeneous rocks. The mechanical behavior and failure mode of clastic rocks is known to vary with microstructural attributes such as porosity and grain size. However, the influence of the grain size distribution, in particular the degree of polydispersivity or modality of the distribution, is not yet fully understood, because it is difficult to study experimentally using natural rocks. To better understand the influence of grain size distribution on the mechanical behavior of porous rocks, we prepared suites of synthetic samples consisting of sintered glass beads with polydisperse grain size distributions. We performed hydrostatic compression experiments and found that, all else being equal, the onset of grain crushing occurs much more progressively and at lower pressure in polydisperse synthetic samples than in monodisperse samples. We conducted triaxial experiments in the regime of shear-enhanced compaction and found that the stress required to reach inelastic compaction was lower in polydisperse samples compared to monodisperse samples. Further, our microstructural observations show that compaction bands developed in monomodal polydisperse samples while delocalized cataclasis developed in bimodal polydisperse samples, where small grains were systematically crushed while largest grains remained intact. In detail, as the polydispersivity increases, microstructural deformation features appear to transition from localized to delocalized through a hybrid stage where a compaction front with diffuse bands propagates from both ends of the sample toward its center with increasing bulk strain.
Citation
Carbillet, L., Heap, M. J., Baud, P., Wadsworth, F. B., & Reuschlé, T. (2022). The Influence of Grain Size Distribution on Mechanical Compaction and Compaction Localization in Porous Rocks. Journal of Geophysical Research. Solid Earth, 127(11), https://doi.org/10.1029/2022jb025216
Journal Article Type | Article |
---|---|
Acceptance Date | Nov 7, 2022 |
Online Publication Date | Nov 13, 2022 |
Publication Date | 2022 |
Deposit Date | Feb 6, 2023 |
Publicly Available Date | Feb 6, 2023 |
Journal | Journal of Geophysical Research: Solid Earth |
Print ISSN | 2169-9313 |
Electronic ISSN | 2169-9356 |
Publisher | American Geophysical Union |
Peer Reviewed | Peer Reviewed |
Volume | 127 |
Issue | 11 |
DOI | https://doi.org/10.1029/2022jb025216 |
Public URL | https://durham-repository.worktribe.com/output/1181612 |
Files
Published Journal Article
(7.1 Mb)
PDF
Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/
Copyright Statement
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
You might also like
Bubble Formation in Magma
(2023)
Journal Article
A universal model for the permeability of sintered materials
(2023)
Journal Article
Bubble rise in molten glasses and silicate melts during heating and cooling cycles
(2022)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2025
Advanced Search