Group A, Poster #125, Fault and Rupture Mechanics (FARM)
The influence of inelastic yielding on dynamic rupture termination and ground deformation at fault bends
Poster Image:

Poster Presentation
2025 SCEC Annual Meeting, Poster #125, SCEC Contribution #14347 VIEW PDF
aining. While a common assumption of these studies is that the surrounding material is purely elastic, geometric complexities likely cause non-elastic deformation occurring co-seismically within the fault zone.
Through dynamic rupture simulations, inelastic off-fault yielding has been shown to reduce slip rates, lower the slip magnitude in the shallow portion of the fault, damp high frequency radiation, affect multi-fault rupture and cause localized uplift. However, the interplay between inelastic yielding and geometric complexities is still not fully understood, and off-fault rheologies are difficult to constrain. In this study we conduct systematic 3D dynamic rupture simulations on strike-strike slip faults using a linear slip weakening friction law to investigate the effects of inelastic yielding on rupture propagation and ground deformation around fault bends. We independently vary the bend angle from -30° to 30° and the material response to parse and highlight the contributions from inelastic yielding. Preliminary results show that the incorporation of off-fault yielding has significant impacts on rupture termination and the associated ground deformation at fault bends, with important implications for better understanding the hazard of geometrically complex fault systems.
SHOW MORE
Through dynamic rupture simulations, inelastic off-fault yielding has been shown to reduce slip rates, lower the slip magnitude in the shallow portion of the fault, damp high frequency radiation, affect multi-fault rupture and cause localized uplift. However, the interplay between inelastic yielding and geometric complexities is still not fully understood, and off-fault rheologies are difficult to constrain. In this study we conduct systematic 3D dynamic rupture simulations on strike-strike slip faults using a linear slip weakening friction law to investigate the effects of inelastic yielding on rupture propagation and ground deformation around fault bends. We independently vary the bend angle from -30° to 30° and the material response to parse and highlight the contributions from inelastic yielding. Preliminary results show that the incorporation of off-fault yielding has significant impacts on rupture termination and the associated ground deformation at fault bends, with important implications for better understanding the hazard of geometrically complex fault systems.
SHOW MORE