Experimental determination of KIIC of normal strength concrete

The double-edge notched specimen made of normal strength concrete has been subjected to compressive loads. It is shown that a shear crack develops at the notch tip. Visual observation and evaluation of displacement measurements have proven that this specimen allows pure mode II testing. It was possible to determine fracture toughness KIIc. Recommendations for the testing are made.RésuméUne éprouvette entaillée sur deux côtés opposés en béton de résistance normale a été soumise à des charges de compression. On démontre que la fissure de cisaillement se développe à la pointe de l’entaille. L’observation visuelle et l’évaluation des mesures de déplacement montre que ce type d’éprouvette permet des essais en mode II pur. Il a été possible de déterminer la résilience à la rupture KIIc. On donne des recommandations pour des essais.

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