Numerical Simulation Analysis of Rock Fracture Propagation Based on VUMAT

The study of crack propagation in rock is of great significance to the stability of structural engineering. In this paper, through ABAQUS software, a simulation method of rock fracture propagation law is proposed. The D-P criterion of shear effect (Drucker Prager criterion) is embedded into the VUMAT subroutine in ABAQUS software, and the rule of rock fracture propagation is analyzed by using the element deletion method. The results show that: (1) stress concentration occurs first at the tip of the prefabricated crack, and then fracture occurs; (2) The fracture pattern is perpendicular to the crack, develops symmetrically, and produces secondary horizontal cracks; (3) The crack develops and forms an anti-wing crack, which continues to expand with the secondary horizontal crack, and finally the rock is destroyed. (4) Compared with the test results, the model can better reflect the law of rock crack propagation.