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 > > > ------------------------------------------------------------------------------ > AppSumo Presents a FREE Video for the SourceForge Community by Eric > Ries, the creator of the Lean Startup Methodology on "Lean Startup > Secrets Revealed." This video shows you how to validate your ideas, > optimize your ideas and identify your business strategy. > http://p.sf.net/sfu/appsumosfdev2dev > _______________________________________________ > Libmesh-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/libmesh-users > ------------------------------------------------------------------------------ AppSumo Presents a FREE Video for the SourceForge Community by Eric Ries, the creator of the Lean Startup Methodology on "Lean Startup Secrets Revealed." This video shows you how to validate your ideas, optimize your ideas and identify your business strategy. http://p.sf.net/sfu/appsumosfdev2dev _______________________________________________ Libmesh-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libmesh-users
