Reply To: Static Structural / Non-linear analysis / Equilibrium iterations count

[peteroznewman]

The 3-8 iterations per substep is a reasonable target, but there is nothing wrong with the solver taking many more substeps when it encounters a difficult part of the solution. Look at the Newton Raphson Force Convergence Plot. If you see several iterations resulting in a Bisection or two, you can prevent that by adding a Step to the solution with the End Time equal to the last converged substep prior to all those wasted iterations that ended in a bisection, and starting the next Step with more substeps in the Initial and Minimum Substeps prior to the solver starting the difficult part of the solution.