Computers and Geotechnics | 2019
Implementation of a modified Drucker–Prager model in the lattice spring model for plasticity and fracture
Abstract
Abstract In this work, a general framework is developed for the incorporation of elasto-plastic constitutive models into the Distinct Lattice Spring Model (DLSM). Within this framework, a smoothed non-associative Drucker-Prager (DP) model is implemented. To verify the model, a number of numerical examples are examined, and the results are compared to the analytical solution, numerical solution based on the Finite Volume Method (FVM), and the experimental results, where available. It is shown that the proposed framework is numerically stable and is capable of solving elasto-plastic problems while maintaining the general advantages of the LSM technique in tacking material fracturing.