Hello Harrison,

You can use a callback to customize your friction model.  Check out this 
demo, demo_MBS_callbackSMC.cpp  
<https://github.com/projectchrono/chrono/blob/main/src/demos/mbs/demo_MBS_callbackSMC.cpp#L112>

Thank you,
Luning

On Saturday, January 11, 2025 at 8:52:58 AM UTC-6 hpe...@usc.edu wrote:

> Hi All,
>
> Does Chrono support directional (anisotropic) friction, where friction 
> varies based on the direction of motion relative to the surface?
>
>  if it doesn't, one approach I’m considering is to use as a work around is 
> the rolling friction feature. By applying it conditionally based on the 
> velocity vector of an object relative to the surface with directional 
> friction, I think this would constitute, for my purposes, anisotropic 
> friction.
>
> Would this be a reasonable way to approximate anisotropic friction in 
> Chrono, or are there better methods or workarounds?
>
> Sincerely,
>
> Harrison Pearl
>

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