Measuring Static/Dynamic Fracture Toughness of Rock Using A Short Rod Specimen

On the basis of the chevron, notched short-rod specimen for fracture toughness test suggested by ISRM, a designed wedge and two semi-circle slices were used to enable compressive force to be applied on the wedge, whereas the crack tip remained loaded in tension. Thus, fracture toughness of rock could be determined by this metaod. Especially, dynamic fracture toughness of rock could be conveniently measured by the method with the wedge and slices, and the effect of loading rates on the fracture toughness of rock could be studied through this way. Finally, some measuring results of static /dynamic fracture toughness for marble were shown.