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

Author(s)

Vargas, R. ; Tsitova, A. ; Bernachy-Barbe, F. ; Bary, B. ; Canto, R. B. ; Hild, F.

• Document type: Journal article
• Source: STRAIN; v. 56, n. 6, p. 22-pg., 2020-07-06.

Abstract

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. Last, the results are confronted with those given by a straight crack to highlight the benefits of accounting for the actual crack path. (AU)

• FAPESP's process: 18/23081-0 - Fracture mechanisms of refractories at room and elevated temperatures analyzed with wedge splitting tests and image correlation
• Grantee: Rafael Vargas Maginador
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/15266-0 - Detection and quantification of fracture mechanisms of ceramics at room and high temperatures using digital image correlation
• Grantee: Rodrigo Bresciani Canto
• Support Opportunities: Regular Research Grants