Too many cutbacks:¶
No convergence could be reached. Try to decrease the initial time step length of auto-timestepping. If the physical contact is involved, than try to adjust it’s parameters so that convergence can be reached easily.
The solution diverged due to no convergence even after decreasing the increment size to the lowest possible level.
What could be the possible reason?¶
This error occurs when using the auto timestepping scheme and the solver tries to solve the problem by automatically decreasing the increment size until the lowest limit is reached after which the increment size can’t be further decreased.
What can I do now?¶
This error normally occurs when your problem involve some kind of nonlinearity and can’t be solved under specific increment size. You can counter this error by doing the following:
- If you have a material nonlinearity involved, try to make the Initial time step length of auto timestepping smaller so the material nonlinearity can be handled easily at the simulation startup.
- If you have a physical contact involved, try to first adjust it’s parameters so the convergence can be reached easily. Than increase them until a desired physical contact behavior is achieved. For example, give initially less values to Slope and Tension at large clearance for a linear pressure-overclosure behavior of penalty contact.