Velocity Dependent Friction: Difference between revisions

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| style="background:yellow; color:black; width:800px" | '''frictionModel VelDependent $frnTag $muSlow $muFast $transRate'''
| style="background:lime; color:black; width:800px" | '''frictionModel VelDependent $frnTag $muSlow $muFast $transRate'''
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Constantinou, M.C., Tsopelas, P., Kasalanati, A., and Wolff, E.D. (1999). “Property modification factors for seismic isolation bearings”. Report MCEER-99-0012, Multidisciplinary Center for
Constantinou, M.C., Tsopelas, P., Kasalanati, A., and Wolff, E.D. (1999). “Property modification factors for seismic isolation bearings”. Report MCEER-99-0012, Multidisciplinary Center for
Earthquake Engineering Research, State University of New York.
Earthquake Engineering Research, State University of New York.
----
RELATED TO:
* [http://opensees.berkeley.edu/wiki/index.php/Flat_Slider_Bearing_Element Flat Slider Bearing Element]
* [http://opensees.berkeley.edu/wiki/index.php/Single_Friction_Pendulum_Bearing_Element Single Friction Pendulum Bearing Element]
* [http://opensees.berkeley.edu/wiki/index.php/Triple_Friction_Pendulum_Element Triple Friction Pendulum Bearing Element]




Latest revision as of 20:05, 18 September 2014



This command is used to construct a VelDependent friction model object. It is useful for modeling the behavior of "PTFE" or PTFE-like materials sliding on a stainless steel surface. For a detailed presentation on the velocity dependence of such interfaces please refer to Constantinou et al. (1999).

frictionModel VelDependent $frnTag $muSlow $muFast $transRate
$frnTag unique friction model object tag
$muSlow coefficient of friction at low velocity
$muFast coefficient of friction at high velocity
$transRate transition rate from low to high velocity


<math>\[\mu = {\mu _{fast}} - \left( {{\mu _{fast}} - {\mu _{slow}}} \right) \cdot {e^{ - transRate\, \cdot \,\left| v \right|}}\]</math>



EXAMPLE:

frictionModel VelDependent 1 0.05 0.163 0.615


REFERENCE:

Constantinou, M.C., Tsopelas, P., Kasalanati, A., and Wolff, E.D. (1999). “Property modification factors for seismic isolation bearings”. Report MCEER-99-0012, Multidisciplinary Center for Earthquake Engineering Research, State University of New York.


RELATED TO:


Code Developed by: Andreas Schellenberg, University of California, Berkeley.

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