Assessment of concrete fracture parameters using Wedge Splitting Test and Mark Tracking method

This paper deals with the characterization of mode I fracture parameters using a kinematic approach integrating the experimental displacement measured by Mark Tracking Method. Tests are carried out using a wedge splitting sample made in concrete. The analysis of the fracture parameters was performed using the Crack Relative Displacement Factor approach and J-integral. By using the optical mark tracking method, the displacement field evolution close to the crack tip is recorded during the test. An adjustment procedure was used to improve the displacement fields and avoid experimental noise. The stress and strain fields are calculated using a finite element model generated from the experimental displacement fields. Further, the energy release rate is evaluated for different crowns defined around the crack tip and for different loading values