*DEBOND

Optional parameters

DEBONDING FORCE

This parameter is relevant only when TYPE=VCCT, TYPE=ENHANCED VCCT, or TYPE=FATIGUE is used on the FRACTURE CRITERION option.

Set DEBONDING FORCE=STEP (default) if the traction between the two surfaces at the crack tip is to be released immediately during the following increment after debonding.

Set DEBONDING FORCE=RAMP if the traction between the two surfaces at the crack tip is to be released gradually during succeeding increments after debonding to avoid a sudden loss of stability.

FREQUENCY

Set this parameter equal to the output frequency, in increments. The crack-tip location and associated quantities will always be printed at the last increment of each step unless FREQUENCY=0. The default is FREQUENCY=1. Set FREQUENCY=0 to suppress this output.

OUTPUT

If this parameter is omitted, crack propagation information will be printed in the data (.dat) file but not stored in the results (.fil) file.

Set OUTPUT=FILE to store the crack propagation information in the results file.

Set OUTPUT=BOTH to print the crack propagation information in the data file and to store it in the results file.

TIME INCREMENT

Set this parameter equal to the suggested time increment for automatic time incrementation to use for the first increment just after debonding starts. The default is the last relative time given on the data lines below.

For fixed time incrementation the value of this parameter will be used as the time increment after debonding starts if Abaqus/Standard finds it needs a smaller time increment than its current value. The time increment size will be modified as required until debonding is complete.