Application of Conjugate Gradient Method in Numerical Implementation of Elasto-plastic Model

Based on the singularity and non-convergence characteristics of the Jacobian matrix, the composition and the algorithm of the elasto-plastic constitutive model were comprehensively analyzed. The problem of solving the highly nonlinear equations in Newton-closest point projection method(Newton-CPPM) implicit algorithm was transformed into a seeking minimum value problem by the conjugate gradient method, and the improvement of traditional …