ProductsAbaqus/StandardAbaqus/CAE
TypeHistory data
LevelStep
Abaqus/CAEStep module
Optional parameters
 DELTMX

This parameter applies only to
Abaqus/Standard
analyses.
Set this parameter equal to the maximum temperature change to be allowed in
an increment during a transient heat transfer analysis.
Abaqus/Standard
will restrict the time step to ensure that this value will not be exceeded at
any node (except nodes whose temperature degree of freedom is constrained via
boundary conditions, MPC's, etc.) during any
increment of the step. If the DELTMX parameter is omitted, fixed time increments will be used.
 END

This parameter applies only to
Abaqus/Standard
analyses.
Set END=PERIOD (default) to analyze a specific time period. Set END=SS to end the analysis when steady state is reached.
This parameter is relevant only for transient analysis.
 STEADY STATE

Include this parameter to choose steadystate analysis. Transient analysis
is assumed if this parameter is omitted.
Optional parameter for cavity radiation analysis
 MXDEM

This parameter applies only to
Abaqus/Standard
analyses.
Set this parameter equal to the maximum allowable emissivity change with
temperature and field variables during an increment. If this value is exceeded,
Abaqus/Standard
will cut back the increment until the maximum change in emissivity is less than
the specified value. If this parameter is omitted, a default value of 0.1 is
used.
Data line to
control incrementation and steadystate conditions in a pure heat transfer
analysis
 First (and only)
line

Initial time increment. If automatic incrementation is used, this should be
a reasonable suggestion for the initial increment size and will be adjusted as
necessary. If direct incrementation is used, this will be the fixed time
increment size.

Total time period. If END=SS is chosen, the step ends when steady state is reached or after
this time period, whichever occurs first.

Minimum time increment allowed. If
Abaqus/Standard
finds it needs a smaller time increment than this value, the analysis is
terminated. If a value is given,
Abaqus/Standard
will use the minimum of the given value and 0.8 times the initial time
increment. If no value is given,
Abaqus/Standard
sets the minimum increment to the minimum of 0.8 times the initial time
increment (first data item on this data line) and 1×10^{5} times the
total time period (second data item on this data line). This value is used only
for automatic time incrementation.

Maximum time increment allowed. If this value is not specified, no upper
limit is imposed. This value is used only for automatic time incrementation.

Temperature change rate (temperature per time) used to define steady state;
only needed if END=SS is chosen. When all nodal temperatures are changing at less
than this rate, the solution terminates.