On the identification of cohesive zone model for curved crack in mortar

R Vargas (1, 2) , A Tsitova (3, 2) , F. Bernachy-Barbe (3) , B Bary (3) , R B Canto (1) , François Hild (2)

1 DEMa - Departamento de Engenharia de Materiais
2 LMT - Laboratoire de mécanique et technologie
3 CEA-DES (ex-DEN) - CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire)

This paper proposes an approach to defining the path of a curved crack in a single edge notched specimen with gray level residuals extracted from digital image correlation, followed by the calibration of the parameters of a cohesive zone model. Only the experimental force is used in the cost function minimized via finite element model updating. The displacement and gray level residual fields allow for the validation of the calibrated parameters. \revision{Last, the results are confronted with those given by a straight crack to highlight the benefits of accounting for the actual crack path.

Mots clés: Calibration; digital image correlation (DIC); finite element model updating (FEMU); gray level residuals

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

R Vargas, A Tsitova, F. Bernachy-Barbe, B Bary, R B Canto, et al.. On the identification of cohesive zone model for curved crack in mortar. Strain, 2020, 56 (6), pp.e12364. ⟨10.1111/str.12364⟩. ⟨hal-02555911⟩