Command Default

Automatic time stepping is on by default.

Notes

Specifies whether to use automatic time stepping (or load stepping) over this load step. If Key = ON, both time step prediction and time step bisection will be used.

Bisection does not occur with THOPT,QUASI since it uses only one equilibrium iteration per substep. To ensure bisection, use the iterative QUASI method ( THOPT,QUASI,,,,,,1).

You cannot use automatic time stepping (AUTOTS), line search (LNSRCH), or the DOF solution predictor (PRED) with the arc-length method (ARCLEN, ARCTRM). If you activate the arc-length method after you set AUTOTS, LNSRCH, or PRED, a warning message appears. If you choose to proceed with the arc-length method, the program disables your automatic time stepping, line search, and DOF predictor settings, and the time step size is controlled by the arc-length method internally.

This command is also valid in PREP7.

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