If we want to develop an analogue or numerical material for the simulation of coupled fault & fracture processes during brittle geological deformation on outcrop or structural scale what is the minimum set of rock parameters required to characterise material rheology?
Fundamental parameters: density, Poisson ratio
For fault processes: internal "peak" friction, stable and dynamic friction, cohesion, shear strength
For fracture processes: Young modulus, tensile strength, compressive strength
Would these parameters be sufficient to properly scale or define analogue/numerical materials to define the key characteristics for coupled fault-fracture processes in natural rocks? What else is required or not?
Please share you ideas.
I think weakening ratio of rock referring to you mentioned track of "peak friction" is also a necessary parameter.
see Lebuis 1983, in think you can see some interest think.
best regards
Thanks, Zaagabe. Do you mean "Lebuis er al. (1983) Regioanl mapping of landslides in Quebec"? It is the only reference I can find. If not, can you provide the full reference, please?
Dear Xiaojun Feng. We consider the weakening ratio by calculating strain softening for the undeformed rock (peak friction - dynamic friction) and for reactivation of the shear zone (stable friction - dynamic friction). I expect this is describing the same parameters you suggested. You can see our workflow for frictional parameters ingranular materials in Lohrmann et al. 2003. Do you consider the weaking ratio as similar parameter or a different one?
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