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*SURFACE BEHAVIOR

Keyword type: model definition, material

With this option the surface behavior of a surface interaction can be defined. The surface behavior is required for any contact analysis. Right now, the contact pressure takes the form in Figure 75. The parameters and define the kind of contact. is the contact pressure at zero distance, is the distance from the master surface at which the pressure is decreased to 1 % of . The behavior in between is exponential. A large value of leads to soft contact, a small value to hard contact.

First line:

- *SURFACE BEHAVIOR

Following line:

- .
- .

    Example:

    *SURFACE BEHAVIOR
    1.e-4,.1

defines a distance of length units at which the contact pressure is .001 pressure units, whereas the contact pressure at loose contact is 0.1 pressure units.

Example files: contact1, contact2.