Utilizing the slip distribution of the Wenchuan earthquake as the driving source we compute the changes of Coulomb failure stress ( CFS) on the neighborhood faults assuming a friction coefficient of 0.4. Our results show that the CFSs have increased on average 1.6 × 10 4 and 1.8 × 10 4 ...
The Coulomb stress (� CST) is defined as: �CST = �τ + µ(�σ + �P) where �τ is the shear stress change, µ is the coefficient of friction, �σ is the change in normal stress and P is the pore pressure c hange31. In this study we neglect pore ...
where ΔCST is the Coulomb stress transfer, Δτis the change in shear stress (in the direction of fault slip),μis the coefficient of friction, Δσis the change in normal stress and ΔPis the change in pore fluid pressure15,17. Pore fluid pressure changes have been hypothesised to tri...
Besides the shear friction model, the Coulomb friction model is also utilized by some researchers. The frictional force in the Coulomb law model is defined by [12.2]fs=μp where fs is the frictional stress, p is the interface pressure between two bodies and µ is the friction coefficient....
normal contact stress. =⇒ If ( u t , −T ν (u)) is a fixed-point of Φ in H 1/2 + (Γ c )×L 2 + (Γ c ), i.e.: Φ( u t , −T ν (u)) = ( u t , −T ν (u)) , then u is a solution to (P). T. Ligurský (Charles University, Prague)...
Angle of internal friction μ = tan ϕ: Coefficient of internal friction σ: Normal stress on plane τ: Shear stress on plane σ1,σ2,σ3 : Principal stresses, with no regard to order σI,σII,σIII : Major, intermediate, minor principal stresses σm : (σI + σIII)/2...
The optimal orientations for optimum CFS on receiver faults are a function of the regional (also called “tectonic”) stress, the stress imparted by the source fault, and the assumed friction coefficient on Coulomb stress change and aftershocks Co-seismic static coulomb stress changes have proven...
(2). Thus, positive increases of the Coulomb stress bring the fault closer to failure, whereas negative increases distance it away from failure. As the real value of the effective friction coefficient \({\mu }^{{\prime} }\) is uncertain37, we will check different values of it as in ...
models with normal fault and thrust fault arrays•Fault dip, dip direction and position influence the distribution of stress changes.•Coseismic slip and friction coefficient affect the magnitude of the stress changes.•Results reveal correlation between the coseismic stress changes and strain field...
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