Experimental Study of Fracture Toughness and Subcritical Crack Growth of Three Rocks under Different Environments

This paper investigates fracture toughness and subcritical crack growth of marble, lherzolite, and amphibolite under different environments aiming to better understand the effect of environment, especially the acidic solution, on the fracturing behavior of the three rocks. Specifically, a series of load relaxation (RLX) and rapid loading tests were performed on double-torsion (DT) specimens to understand the subcritical crack growth velocity V...