Cohesive fracture model of rocks based on multi-scale model and Lennard-Jones potential

With the aim of modelling energy dissipation phenomenon during initiation and propagation cracks, a novel cohesive fracture model is proposed in this study based on multi-scale rocks Lennard-Jones potential between non-bonding molecules. The establishes corresponding relationship deformation suggests that essentially manifestation transformation into First, established structural characteristics rocks, relation at different scales analysed. Thereafter, force equations to tensile shear processes are established. Finally, accuracy verified through three numerical simulations. results indicate can accurately fit theoretical values experimental Mode-I Mode-II tests. In uniaxial compression test, simulate compressive strength pattern rocks.