Coupling DDA and 4D-LSM through contact theory for rock cutting

Abstract

Abstract In this work, the rock cutting is modelled through coupling of 4D-LSM with DDA. The rock cutter and its 3D motion were simulated by using DDA with triangular surface mesh, and the rock is modelled by using 4D-LSM with multi-body failure criterion. The dynamic contact treatment between the cutter and the rock specimen was further handled by using Dr. Shi’s contact theory where the entrance block of the cutter between spherical particles was used to calculate the contact forces. Then, the 4D-LSM and DDA were coupled through an explicit-implicit mixed solving scheme. Finally, the coupled model is used to model rock cutting problems and compared with exist numerical approach to highlight its advantages.