On the analysis of notched concrete beams: From measurement with Digital Image Correlation to identification with Boundary Element Method of a cohesive model

Manuel D.C. Ferreira (1) , Wilson Venturini (1) , François Hild (2)

1 Department of Structural Engineering
2 LMT - Laboratoire de Mécanique et Technologie

A way of coupling digital image correlation (to measure displacement fields) and boundary element method (to compute displacements and tractions along a crack surface) is presented herein. It allows for the identification of Young's modulus and fracture parameters associated with a cohesive model. This procedure is illustrated to analyze the latter for an ordinary concrete in a three-point bend test on a notched beam. In view of measurement uncertainties, the results are deemed trustworthy thanks to the fact that numerous measurement points are accessible and used as entries to the identification procedure.

Mots clés: boundary elements; cohesive crack; digital image correlation; inverse analysis; parameter identification

Domaines: Mécanique des matériaux [physics.class-ph]; Mécanique des matériaux [physics.class-ph]

Manuel D.C. Ferreira, Wilson Venturini, François Hild. On the analysis of notched concrete beams: From measurement with Digital Image Correlation to identification with Boundary Element Method of a cohesive model. Engineering Fracture Mechanics, 2011, 78, pp.71-84. ⟨10.1016/j.engfracmech.2010.10.008⟩. ⟨hal-00614875⟩