A geometric damage mechanical analysis method for mechanical properties of a rock-like fracture sample

The invention belongs to the field of civil engineering, and particularly relates to a geometric damage mechanical analysis method for mechanical properties of rock-like fracture samples. The geometric damage mechanical analysis method for mechanical properties of a rock-like fracture sample comprises the following steps of (1) constructing a geometric model of a representative unit of the rock-like fracture sample; (2) defining a damage tensor of a representative unit of the rock-like fracture sample; (3) calculating the damage tensor of the single group of rock-like fracture samples; (4) calculating damage tensors of the plurality of groups of rock-like fracture samples; (5) deducing an effective stress formula of the rock-like fracture sample, and establishing a geometric damage constitutive model of the rock-like fracture sample; (6) programming the geometric damage constitutive model of the rock-like fracture sample; and (7) carrying out statistics on the fracture geometric parameters of the engineering