Abstract
Splitting tests were conducted using large specimens of Ogino tuff in order to investigate the process of fracture propagation and also to clarify the size effect in fracture toughness of the rock-including specifically the effects of thickness, width and height of specimen as well as that of crack length. Two types of stiff loading apparatus, a wedge type and a screw type, were used for controlling fracture propagation; and fracture toughness during the process of fracture propagation was determined with compliance calibration. From the results on size effects, a standard size of the specimen was proposed to obtain a specimen size-independent fracture toughness value in the splitting test.
Published Version
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