*PRESSURE PENETRATION
OP
Set OP=MOD (default) for existing pressure penetration loads to rem ain, with this option modifying
existing pressure penetrationloads or defining additional pressure penetration loads.
SetOP=NEW if all existing pressure penetration loads applied to the model shouldbe removed.
New pressure penetration loads can be defined.
PENETRATIONTIME
Set this parameter equal to a time period over which the fluidpressure on newly penetrated contact
surface segments is ramped up to the current magnitude. The default pen etration time period is
chosento be 0.001 of the current step time. Thisparameter 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.
Data lines to define the pressure penetration loads:
First line:
1. Anode on the slave surface that is exposed to the fluid.
2. Anode 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.
3. Fluidpressure magnitude.
4. Enter the c ritical contact pressure below which fluid penetration starts to occur. The hi gher
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 locationson the
surface,possibly with different fluid pressure magnitudes. Alter natively,the *PRESSURE PENETRATION
option can be repeated (if, forexample, a different amplitude reference is needed).
16.24–2
ABAQUS Version 6.1 Module: ID:
Printed on: