A model for the formation and propagation of faults from the coalescence of smaller-scale systems of cracks: Finite Element Method-based numerical approach

• DOI: 10.5194/egusphere-egu24-13117
• Publication Date: 2024-03-08T23:32:02Z
• Authors: Ludovico Manna; Giovanni Toscani; Matteo Maino; Leonardo Casini; Marcin Dabrowski
• Keywords: Coalescence (physics)

The 2D, plane strain, Finite Element Method-based linear elastic model that I present aims to assess the differential stress response variations in geometric configuration of a system multiple collinear elliptic cracks intercepting body rock undergoing deformation. assumption underlying this simulation is collection thin voids continuum medium can replicate features observed consisting rough fault profiles partial contact subjected shear. designed reproduce and displacement fields around fault, with specific focus on concentration its asperities. also allows record principal field domain for wide range scales properties embedded deforming rock. Analyzing dependence parameters describing geometry fractures considerations primary factors influencing brittle failure. Additionally, examination stresses tips helps evaluate potential orientation new fracture patterns may emerge when yield strength material locally exceeded. magnitude are crucial understanding coalescence frictional reactivation shear an rock, which turn one main govern seismic cycle natural faults. Furthermore, comparison results recent wing crack models creep suggest our code be useful obtain estimates critical distance between their interaction coalesce into larger fractures. process assumed indefinitely continue at greater scales, offers chance propose formation propagation.