Properties of inelastic yielding zones generated by in-plane dynamic ruptures—I. Model description and basic results

摘要: We discuss results associated with 2-D numerical simulations of in-plane dynamic ruptures on a fault governed by slip-weakening and rate-and-state friction laws off-fault yielding. The onset yielding is determined Mohr–Coulomb-type criterion whereas the subsequent inelastic response described Duvaut-Lions-type viscoplastic rheology. study attempts to identify key parameters conditions that control spatial distribution intensity variation zones, local orientation expected microfractures, scaling relations or correlations among different quantities can be used characterize zones. In this paper, we present example for crack pulse ruptures, along calculations energy partition characteristics simulated A companion follow-up paper provides comprehensive parameter-space various examined features. agreement previous studies, location shape zones depend strongly angle ψ background maximum compressive stress relative versus mode rupture. Following initial transients nucleation rate components (including dissipation) linearly increases time cracks, while approaching constant level pulse-like ruptures. microfractures generally shallower steeper than in compressional extensional quadrants, respectively. scalar seismic potency density decays logarithmically increasing normal distance, decay slope value are influenced operating field.