Abstract
A novel testing procedure for mixed mode crack propagation in concrete is presented: four point bend of notched beams under the action of two independent force actuators. In contrast to classical procedures, this method allows nonproportional loading and crack trajectory modifications by changing the action of one actuator. Different experimental crack trajectories, under mixed mode and nonproportional loading, are presented together with the corresponding curves of load-CMOD and load-displacement. The tests were performed for three homotetic specimen sizes and two mixed mode loading conditions. The results are useful for checking the accuracy of mixed mode fracture analytical and numerical models. The models should predict the crack trajectory and a complete group of experimental records of load and displacements on several control points in the specimen.
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Gálvez, J., Elices, M., Guinea, G. et al. Mixed Mode Fracture of Concrete under Proportional and Nonproportional Loading. International Journal of Fracture 94, 267–284 (1998). https://doi.org/10.1023/A:1007578814070
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DOI: https://doi.org/10.1023/A:1007578814070