Convergence criteria for nonlinear problems

Warning:

The information in this section is provided for users who may wish to adjust the convergence criteria for the solution of nonlinear systems. In most cases these criteria need not be adjusted.

In nonlinear problems the governing balance equations must be solved iteratively. This section describes:

  • the field equations that can be solved by Abaqus/Standard;

  • the criteria used to establish convergence of each iteration during the solution;

  • “severe discontinuity” iterations; and

  • the line search algorithm, which can be used to improve the robustness of the Newton method.

The following topics are discussed:

Related Topics
About convergence and time integration criteria
In Other Guides
*CONTROLS
Customizing general solution controls

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