Velocity Dependent Friction: Difference between revisions
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<math>t + \Delta t\!</math> | <math>t + \Delta t\!</math> | ||
<math>\mu = !</math> | <math>\mu\ = !</math> | ||
<math>{\mu _{fast}} - \left( {{\mu _{fast}} - {\mu _{slow}}} \right) \cdot {e^{ - transRate\, \cdot \,\left| v \right|}}\!</math> | <math>{\mu _{fast}} - \left( {{\mu _{fast}} - {\mu _{slow}}} \right) \cdot {e^{ - transRate\, \cdot \,\left| v \right|}}\!</math> | ||
Revision as of 03:25, 23 January 2012
- Command_Manual
- Tcl Commands
- Modeling_Commands
- model
- uniaxialMaterial
- ndMaterial
- frictionModel
- section
- geometricTransf
- element
- node
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- mp commands
- timeSeries
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- block commands
- region
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- Analysis Commands
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This command is used to construct a VDependent 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 VDependent $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>t + \Delta t\!</math>
<math>\mu\ = !</math>
<math>{\mu _{fast}} - \left( {{\mu _{fast}} - {\mu _{slow}}} \right) \cdot {e^{ - transRate\, \cdot \,\left| v \right|}}\!</math>
EXAMPLES:
frictionModel VDependent 1 0.085 0.163 0.77
Code Developed by: Andreas Schellenberg, University of California, Berkeley.