Hello everyone, For some further applications, I need to access to the assembled system at each Newton iteration of a nonlinear hyperelasticity problem. Therefore I build my own Newton Solver using petsc4py: def NewtonSolver(G, u, bcs, dG): tol = 1e-10 error = 1. it = 0 while error…

Custom Newton Solver problem with Dirichlet conditions

nate January 31, 2020, 3:42pm 4

Or use this with a PETScSNESSolver where you can get access to the underlying SNES (which I assume is what you want).

Topic		Replies	Views
Problems with Custom Newton Solver for Elasticity dolfinx	1	914	September 12, 2022
Custom NewtonSolver using the mixed-dimensional branch and PETScNestMatrix	5	1201	April 3, 2020
Creating a linear and newton solver	2	737	May 30, 2020
Incompressible Linear Elasticity fails in the second time step	1	489	March 5, 2021
Problem with petsc ksp.solve in parallel Linear Algebra	3	1700	February 6, 2020