ABAQUS Volume II: I–Z - Manual (Page 65)

*INITIAL CONDITIONS
SECTION POINTS
This parameter is used only with TYPE=PLASTIC STRAIN, TYPE=STRESS, and
TYPE=HARDENING to specify plastic strains, stresses, and hardening variables at individual
section points through the thickness of a shell element. This parameter can be used only when shell
properties are defined using the *SHELL SECTION option. It cannot be used when properties
are defined using the *SHELL GENERAL SECTION option.
UNBALANCED STRESS
This parameter is used only with TYPE=STRESS.
Set UNBALANCED STRESS=RAMP (default) if the unbalanced stress is to be resolved
linearly over the step.
Set UNBALANCED STRESS=STEP if the unbalanced stress is to be resolved in the first
increment.
USER
This parameter applies only to ABAQUS/Standard analyses.
This parameter can be used with TYPE=HARDENING, TYPE=PORE PRESSURE,
TYPE=RATIO, TYPE=SOLUTION, or TYPE=STRESS.
When used with TYPE=HARDENING, it specifies that the initial conditions on equivalent
plastic strain and, if relevant, backstress tensor are to be given via user subroutine HARDINI.
When used with TYPE=PORE PRESSURE, it specifies that initial pore pressures are to be
given via user subroutine UPOREP.
When used with TYPE=RATIO, it specifies that initial void ratios are to be given via user
subroutine VOIDRI.
When used with TYPE=SOLUTION, it specifies that initial solution-dependent state variable
fields are to be given via user subroutine SDVINI.
When used with TYPE=STRESS, it specifies that stresses are to be given via user subroutine
SIGINI .
VARIABLE
This parameter is used only with TYPE=FIELD when it is used to define the field variable number.
The default is VARIABLE=1. Any number of separate field variables can be used: each must be
numbered consecutively (1, 2, 3, etc.)
Data line for TYPE=ACOUSTIC STATIC PRESSURE:
First (and only) line:
1. Node set or node number.
2. Hydrostatic pressure at the first reference point.
3. X-coordinate of the first reference point.
4. Y-coordinate of the first reference point.
5. Z-coordinate of the first reference point.
6. Hydrostatic pressure at the second reference point.
9.18–5
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