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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 $ c_0$ and $ p_0$ define the kind of contact. $ p_0$ is the contact pressure at zero distance, $ c_0$ is the distance from the master surface at which the pressure is decreased to 1 % of $ p_0$. The behavior in between is exponential. A large value of $ c_0$ leads to soft contact, a small value to hard contact.


First line:

Following line:

Example:

*SURFACE BEHAVIOR
1.e-4,.1

defines a distance of $ 10^{-4}$ 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.



guido dhondt 2007-08-09