Expermental Study for the Dynamic Mechanical Behavior of Granite

Granite dynamic compression and dynamic tensile tests were carried out by using a Φ74mm split Hopkinson pressure bar setup. Granite dynamic mechanical parameters under different strain rates ranging from 100s-1 to 102s-1 were obtained. At the same time,numerical simulation of dynamic stress distribution in specimens was performed to validate the experiment. Test results show that granite dynamic mechanical behavior of compression and splitting tensile has distinguishable strain rate effect. With the increasing of strain rate,the impact compression failure stress,the impact compression failure strain,the elastic modulus,the strain energy density of impact compression and the failure strength of dynamic splitting tensile present increase with different degrees.