Document Type
Article
Publication Date
11-1-2020
Department
Department of Geological and Mining Engineering and Sciences; Department of Mechanical Engineering-Engineering Mechanics
Abstract
Fluid-filled volumes in geological systems can change the local stress field in the host rock and may induce brittle deformation as well as crack propagation. Although the mechanisms relating fluid pressure perturbations and seismicity have been widely studied, the fluid-solid interaction inside the crack of a host rock is still not well understood. An analog experimental model of fluid intrusion in cracks between planar layers has been developed to study stress conditions at the margins and tips. A combined high-speed shadowgraph and a photoelasticity imaging system is used to visualize the fluid dynamics and induced stresses on the solid matrix. Cavitation, as well as bubble growth and collapse, occurs along the sawtooth crack margins, which produces a highly localized stress concentration to initiate new subcrack systems. The presence of the bubbles at the crack tip during fluid pressure perturbation can enhance crack propagation.
Publication Title
Earth and Space Science
Recommended Citation
Cao, H.,
Medici, E. F.,
Waite, G. P.,
&
Askari, R.
(2020).
Effect of Geometry and Fluid Viscosity on Dynamics of Fluid-Filled Cracks: Insights From Analog Experimental Observations.
Earth and Space Science,
7(11).
http://doi.org/10.1029/2020EA001333
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/14356
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Version
Publisher's PDF
Included in
Geological Engineering Commons, Mechanical Engineering Commons, Mining Engineering Commons
Publisher's Statement
©2020. The Authors. Publisher’s version of record: https://doi.org/10.1029/2020EA001333