FraMCoS 8 2013 Toledo, Spain

XFEM using a Non Linear Fracture Mechanics Approach for Concrete Crack Propagation in Dam Safety Assessment

This paper presents a crack model that couples the benefits of the damage mechanics approach and the extended finite element method (XFEM). A local crack-tracking technique is devel- opedtopropagatea crack pattern along a single row of finite elements as a…

First page of: XFEM using a Non Linear Fracture Mechanics Approach for Concrete Crack Propagation in Dam Safety Assessment
Year 2013
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Abstract

This paper presents a crack model that couples the benefits of the damage mechanics approach and the extended finite element method (XFEM). A local crack-tracking technique is devel- opedtopropagatea crack pattern along a single row of finite elements as a function of the equivalent principal stress direction. The level-sets are computed to predict the crack path and with the use of continuumdamagemechanics,thepathiscorrected. Once acertain levelof damageis reached inside an element, the level-sets computed previously are used to apply the XFEM formulation with Heavi- sidefunctionwithinthiselementintroducingadiscontinuityinthedisplacementfield. Thethreepoint beam tested by Bažant and Pfeiffer, the shear beam with single notch tested by Arrea and Ingraffea andthetension-shearspecimentestedbyNooru-Mohamedareusedforthevalidationoftheproposed modelthat is targeted to be used shortly in dam safety application.