Modeling of stress-dependent properties during the closure of prestressed elliptical and nonelliptical fractures

(1) ellipse_data.rar and polygonal_data.rar are the files to describe the elliptical and nonellipticla fracture surface coordinates under the compression. For example, the title of the text file "20-cracks-distance-2-3-AR2". It means that the model contains 20 fractures inside, and the "2" means the model b in Figure 4. 3 means the third generation of the randomly distributed cracked model. AR2 means that the fracture inside the model is dominated by fracture Ⅱ. (2) codes.rar is used to get the numerical simulation and process the data for the result. (3) velocity_fit.rar is used to get the fitting parameters based on the stress-dependence of the velocity.