HYDRAULIC FRACTURE SIMULATIONUSING A DISCRETE CRACK APPROACH

J.M. Segura  I. Carol       

Anales de la Mecánica de la Fractura, nº 22 . 2005 . Pág. -
Ver (.pdf): 88

Resumen: This paper deals with hydromechanical (HM) coupling analysis of discontinuities, devoting special attention to the hydraulic description of the model. The problem formulation falls within the so-called discrete crack approach, which discretizes each discontinuity explicitly by means of zero-thickness interface elements that must be equipped with the appropriate constitutive law. The coupled problem is solved following a staggered strategy, where the same Finite Element mesh is used in the mechanical and the flow problems since the same zero-thickness interface element with double nodes is used for both joint formulations. The innovative flow model with double nodes is compared to other discrete flow models existing in literature. Two different HM applications are presented, one of them dealing with pre-existing discontinuities and the other one dealing with a fluid-driven fracture (i.e. hydraulic fracture).

LocalizaciónAlmagro

E.T.S. d’Enginyers de Camins Canals i Ports de Barcelona, Universitat Politècnica de Catalunya
E.T.S. d’Enginyers de Camins Canals i Ports de Barcelona, Universitat Politècnica de Catalunya