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*SOLVER CONTROLS
Specify controls for the iterative and direct linear solvers.

This option is used to set the control parameters for both the direct and iterative linear equation solvers.

Products: Abaqus/Standard  Abaqus/CAE  

Type: History data

Level: Step

Abaqus/CAE: Step module

References:

Optional parameters:

CONSTRAINT OPTIMIZATION

Include this parameter to optimize the handling of hard contact and compressibility constraints associated with hybrid elements.

RESET

Include this parameter to reset all of the iterative solver controls to their default values. The option should have no data lines when this parameter is used.

If this parameter is omitted, only the iterative solver specified controls will be changed in the current step; the other controls will remain at their settings from previous steps.

Data line to define control parameters for the iterative solver: 

First (and only) line:

  1. Relative tolerance for convergence. The default is 10–3 for all general procedures. For linear perturbation procedures, the default is 10–6.

  2. Maximum number of iterations allowed. The default is 300.

  3. ILU factorization fill-in level. The default is 0; the maximum is 3. This parameter applies only to porous media (soils) analyses.