This option is used to prescribe pressure penetration loading simulated with surface-based contact.
Product: ABAQUS/Standard
Type: History data
Level: Step
Set this parameter equal to the name of the master surface of the contact pair used in the pressure penetration analysis.
Set this parameter equal to the name of the slave surface of the contact pair used in the pressure penetration analysis.
Set this parameter equal to the name of the amplitude curve that defines the variation of the fluid pressure during the step. If this parameter is omitted, the reference magnitude is applied immediately at the beginning of the step or ramped up linearly over the step, depending on the value assigned to the AMPLITUDE parameter on the *STEP option (see “Procedures: overview,” Section 6.1.1 of the ABAQUS Analysis User's Manual).
Set this parameter equal to the load case number. This parameter is used only in *STEADY STATE DYNAMICS analyses (direct or modal—see “Direct-solution steady-state dynamic analysis,” Section 6.3.4 of the ABAQUS Analysis User's Manual, and “Mode-based steady-state dynamic analysis,” Section 6.3.8 of the ABAQUS Analysis User's Manual). It is ignored in all other procedures. LOAD CASE=1 (default) defines the real (in-phase) part of the loading, and LOAD CASE=2 defines the imaginary (out-of-phase) part of the loading.
Set OP=MOD (default) for existing pressure penetration loads to remain, with this option modifying existing pressure penetration loads or defining additional pressure penetration loads.
Set OP=NEW if all existing pressure penetration loads applied to the model should be removed. New pressure penetration loads can be defined.
Set this parameter equal to a time period over which the fluid pressure on newly penetrated contact surface segments is ramped up to the current magnitude. The default penetration time period is chosen to be 0.001 of the current step time. This parameter will be neglected in a linear perturbation analysis, in which case the current fluid pressure will be applied immediately once the pressure penetration criterion is satisfied.
First line:
A node on the slave surface that is exposed to the fluid.
A node on the master surface that is exposed to the fluid. This field should be left blank if the master surface is an analytical rigid surface.
Fluid pressure magnitude.
Enter the critical contact pressure below which fluid penetration starts to occur. The higher this value, the easier the fluid penetrates. The default is zero, in which case fluid penetration occurs only if contact is lost.
Repeat this data line as often as necessary to define fluid penetrations from different locations on the surface, possibly with different fluid pressure magnitudes. Alternatively, the *PRESSURE PENETRATION option can be repeated (if, for example, a different amplitude reference is needed).