Adding friction to Step 42

[Mohammadreza ya'ghoobi]

Hi,

I'm trying to add friction to the step 42. What would be the most efficient way to add friction to this step. What modules do I need to change?

Any suggestions would be highly appreciated.

Thanks

Reza

[Wolfgang Bangerth]

On 10/15/21 6:58 PM, Mohammadreza ya'ghoobi wrote:
>
> I'm trying to add friction to the step 42. What would be the most efficient
> way to add friction to this step. What modules do I need to change?

Mohammadreza
while I'm an author of step-42, I'm not an expert in friction. As a
consequence, I don't have any particularly good suggestions other than to
suggest starting with a clarified question. Namely, step-42 is a program that
solves a static problem and as a consequence there is no place where dynamic
(kinetic) friction can play a role. Static setups can experience static
friction ("stiction") but only as a result of a time history, which step-42
does not have. As a consequence, if you wanted to include stiction, you would
still have to somehow describe a load history, for example.

My suggestion would therefore be for you to clarify what friction effects you
want to model exactly, and maybe what formulation you are considering. Though
I will have to mention that even if you did, I may not be able to suggest any
specific steps to achieve what you are looking for. It might help others on
this mailing list to do so, however.

Best
W.

--
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Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/