Maximum Twin Shear Stress Factor Criterion for Crack Sliding Initiation

In civil engineering, hydraulic engineering and so, the shear fracture phenomena of concrete material exists extensively. So the fracture criterion of the crack tip mixed mode deformation has been one of the important problems of fracture mechanics of concrete. In the present study, a maximum twin shear stress factor criterion for mixed slide mode fracture initiation is proposed. By concrete subjected to shear box test, this criterion is in agreement with experimental results of the cleavage angle.