Geomechanical Modelling of Fracture Propagation under Finite Strain. Prefracture Zones.
V.A. Levin, K.M. Zingerman and A.V. Vershinin
Journal name: Seismic Technology
Issue: Vol 11, No 4, October 2014 pp. 1 - 11
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A geomechanical model is developed to simulate the formation and propagation of a defect meant as a crack (fracture) with a nonzero thickness. The modelling is performed with the axiomatics of deformable solid mechanics, using the concept of a prefracture zone. The prefracture zone is a part of a solid where the properties of material change under external loads. The behaviour of the prefracture zone is explained in terms of repeated superposition of large deformations when non-local strength criteria apply. The model is tested through finiteelement analysis of fracture growth.