Numerical and Experimental Study of Mixed-Mode Crack Growth in a Brittle Asymmetrical SNEB Specimen Under Three-Points Bending Test

A mixed-mode crack (first and second modes of fracture) has been considered in an unsymmetrical single notched edge bending specimen and the crack growth path has been found through numerical simulations. The supposed rock is a kind of natural decorative and construction marble, namely, Gohareh. Then by testing eight symmetrical and five unsymmetrical SENB specimens under three-points bending test the fracture toughness of the first mode and the crack growth path were obtained. The result shows that the fracture toughness of the first mode in numerical analysis is almost 25% less than the experimental fracture toughness which was 1.1 MPa.m0.5.

کلیدواژه ها:

Fracture Toughness ، Marble Rock ، Mixed Mode ، Crack Growth