Ali Tarokh
University of Illinois at Urbana–Champaign
Digital image correlationModuliGeologyBrittlenessDiscontinuity (geotechnical engineering)Composite materialDiscrete element methodFree surfaceAcoustic emissionPoromechanicsGeotechnical engineeringGrain sizeMaterials scienceMineralogyInstabilityDisplacement (orthopedic surgery)SofteningPlane stressPeak loadProcess zoneFracture (geology)Experimental dataMechanicsFracture mechanicsSpallSedimentary rockPorosityThree point flexural testBendingStress (mechanics)Shear (geology)Scaling
25Publications
8H-index
216Citations
Publications 25
Newest
#1Ali Tarokh (UIUC: University of Illinois at Urbana–Champaign)H-Index: 8
#2Roman Y. Makhnenko (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
Last. Dustin E. Sweet (TTU: Texas Tech University)H-Index: 11
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Abstract Subsurface reservoirs are targeted formations for geologic carbon dioxide (CO2) storage. Even if proper management of injection pressures minimizes the risks of induced seismicity, high pressure CO2 can interact with brine-saturated host rock and cause microstructural changes that lead to alterations in poromechanical properties of the rock. The effect is well pronounced in carbonate-rich rock, but observations on silica-rich reservoirs are ambiguous. In this study, we report a broad ra...
2 CitationsSource
#1Ali Tarokh (UIUC: University of Illinois at Urbana–Champaign)H-Index: 8
#2Roman Y. Makhnenko (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
7 CitationsSource
#1Francesco Parisio (Helmholtz Centre for Environmental Research - UFZ)H-Index: 7
#2Ali Tarokh (UIUC: University of Illinois at Urbana–Champaign)H-Index: 8
Last. Thomas Nagel (Helmholtz Centre for Environmental Research - UFZ)H-Index: 19
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Abstract Failure in brittle rock happens because micro-cracks in the crystal structure coalesce and form a localized fracture. The propagation of the fracture is in turn strongly influenced by dissipation in the fracture process zone. The classical theory of linear elastic fracture mechanics falls short in describing failure when the dissipation in the fracture process zone is non-negligible; thus, a non-linear theory should be employed instead. Here we present a study in which we explore the ch...
15 CitationsSource
#1Roman Y. MakhnenkoH-Index: 12
#2Ali TarokhH-Index: 8
Source
Pressure decline caused by the extraction of oil from deep sedimentary layers depends on the pore modulus Kpp, a poroelastic parameter that characterizes the effect of pressure change on pore volum...
11 CitationsSource
#1Ali TarokhH-Index: 8
#2Joseph F. LabuzH-Index: 32
Deposited here are Excel spreadsheets containing all figure data except for figures 1 and 2. Descriptions of each file can be found in "Tarokh-Labuz-Readme.txt".
Source
#1Roman Y. Makhnenko (UIUC: University of Illinois at Urbana–Champaign)H-Index: 12
#2Ali Tarokh (UIUC: University of Illinois at Urbana–Champaign)H-Index: 8
2 Citations
#1Ali Tarokh (UMN: University of Minnesota)H-Index: 8
#2Yuan Li (USTB: University of Science and Technology Beijing)H-Index: 3
Last. Joseph F. Labuz (UMN: University of Minnesota)H-Index: 32
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Knowledge of compactant behavior and the associated subsidence for high porosity carbonate formations is crucial in applications such as enhanced oil recovery. To gain insights into inelastic compaction and failure modes of a porous chalk under different loading histories, triaxial compression experiments were conducted on a high porosity (45 %) chalk, tested using three stress paths: no precompaction (virgin rock), precompacted to 30 MPa, and precompacted to 60 MPa. For the virgin chalk with no...
7 CitationsSource
#1Roman Y. MakhnenkoH-Index: 12
#2Ali Tarokh (UMN: University of Minnesota)H-Index: 8
Last. Yuri Podladchikov (UNIL: University of Lausanne)H-Index: 49
view all 3 authors...
6 CitationsSource
#1Ali Fakhimi (New Mexico Institute of Mining and Technology)H-Index: 18
#2Ali Tarokh (UMN: University of Minnesota)H-Index: 8
Last. Joseph F. LabuzH-Index: 32
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Abstract A three point bending fracture test was performed on a typical quasi-brittle material (Berea sandstone). The loading was continued into the post-peak region where crack growth was visible along the center line of the beam. Subsequent inspection of a portion of the specimen showed that part of the fracture offered no resistance to loading – a cohesionless crack existed. Digital image correlation was used to study the nature of the displacement discontinuity associated with the cohesionle...
13 CitationsSource