Fracture energy for three-point-bend tests on single-edge-notched beams

Three test series of single-edge-notched beams in three-point bending are conducted to evaluate the fracture energy of concrete. The fracture energy is determined from the area under the complete load: load-point deflection diagram. The nonlinear fictitious crack model is implemented in a finite-element analysis showing good agreement with the experimental data.By varying the notch depth and the beam depth it is shown that the fracture energy, traditionally presented as a material property, depends upon the specimen size and configuration. This is atributed to the energy dissipation in the process zone which is not accounted for in the analytical model.

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