Abstract
Precracked chevron-notched Brazilian disc specimens were impacted by a split Hopkinson pressure bar to determine the dynamic propagation toughness of marble. The dynamic expansion process of the crack was measured by a crack propagation gauge glued ahead of the specimen’s crack tip. A fractal crack propagation model was introduced to modify the universal function, and the dynamic propagation toughness of marble was calculated using an experimental–numerical–analytical method. The results show that, when the crack speed is in the range from 0.42 to 0.54 CR, both the fractal dimension and the dynamic propagation toughness increase with the crack propagation speed and with an approximately linear relationship.
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