Photoporomechanics: An Experimental Method to Visualize the Effective Stress Field in Fluid-Filled Granular Media
Name
PhysRevApplied.16.024043.pdf
Description
Published version
Size
3.02 MB
Format
Adobe PDF
Checksum (MD5)
aa5abfea9949f3b6f85d9d2225ec4705
Author(s)
Li, Wei
Meng, Yue
Primkulov, Bauyrzhan K
Juanes, Ruben
Date Issued
August 2021
Journal
Physical Review Applied
Publisher
American Physical Society (APS)
Citation
Li et al., “Photoporomechanics: An Experimental Method to Visualize the Effective Stress Field in Fluid-Filled Granular Media.” Phys. Rev. Applied 16 (2020)
Version
Final published version
Abstract
Effective stress governs the mechanical behavior of porous media. In this study, we use photoelasticimetry to visualize the evolving effective stress field in fluid-filled granular media in processes that couple fluid flow and mechanical deformation. We refer to this experimental method as photoporomechanics. We develop a fabrication process to produce millimeter-scale residual-stress-free photoelastic spheres with high geometric accuracy. We use color to quantify the forces acting on the particles over a wide range of forces, while using light intensity for a small range of forces. We then provide an application of photoporomechanics to illustrate the evolution of effective stress during one-dimensional consolidation: a process by which the stresses caused by a sudden load are gradually transmitted through a fluid-filled granular pack as the fluid drains and excess pore pressures dissipate. Our technique provides a powerful experimental model system to study the grain-scale underpinning of coupled solid-fluid processes in granular media.
MIT Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/physrevapplied.16.024043
