Hi Vas,
Thank you much for your experiences.
That will be terrific if you can share your code with me and the libmesh
community. It will be definitely a good starting point for me.
Thanks,
Guanglei
On Mon, Jul 18, 2011 at 1:41 AM, Vasilis Vavourakis <[email protected]>wrote:
>
> hi all :) i've tried using limesh for a simple contact problem of two
> elastic bodies, like Mengda describes, but i have not checked for the issues
> that Roy mentioned above ...and the most important part for which i have not
> yet come into a clear conclusion is the decision of a proper "penalty"
> parameter for the imposition of the traction forces due to contact.
>
> will work on the matter in the next few weeks ... Mengda, if you think that
> it's ok for you, i can forward you my source code in case you have time to
> check out about contact.
>
>
> Vas
>
>
> 2011/7/18 Roy Stogner <[email protected]>
>
>>
>> On Sun, 17 Jul 2011, Mengda Wu wrote:
>>
>> > Sure. I am trying to solve a problem with two linear elastic bodies. One
>> is
>> > pushing the other at contact boundary. It this something libmesh can
>> > handle?
>>
>> Technically - yes, I'm told people have done it, and there's nothing
>> in the library that's really incompatible with any contact
>> formulations.
>>
>> Practically, your application code would have to deal with a few
>> issues to worry about that we don't cover in any of the examples and
>> that we don't provide decent in-library APIs for. Identifying contact
>> patches efficiently probably requires a more sophisticated algorithm
>> than our PointLocator octrees, and you'd need to add Jacobian sparsity
>> pattern entries by hand if you're trying to do an implicit
>> formulation.
>> ---
>> Roy
>>
>>
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