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- - **Contact problem (boundary condition) for stress analysis**
(*http://www.cfd-online.com/Forums/openfoam-pre-processing/92630-contact-problem-boundary-condition-stress-analysis.html*)

Contact problem (boundary condition) for stress analysisDear Foamers,
In the paper "Finite Volume Methodology for Contact Problems of Linear Elastic Solids" by Jasak and Weller (2000), it seems there exists a BC for the contact problem in linear elastic stress analysis. I wonder if this BC can be found by default in OF (I searched the derived BCs folder but none seems to have a representative name of the problem). If not, how can one obtain such BC? Best regards, Hisham |

Hi Hisham,
Quote:
You can find it in $FOAM_SOLVERS/newStressAnalysis/newContactStressFoam. However this solver does not work correctly anymore. I am working on a different contact stress solver as part of my PhD and it works better (OpenFOAM Workshop Presentation and Abstract). It still has some bugs but gives good results. I can send you my latest solver and a test case if you like (just private mail me your email address)? Some time over the next year I will probably tidy up this solver and it can be put into OpenFOAM Extend and the older non-working one can be removed. Philip |

Hi Philip,
It is great to know you're working on that problem. I will take a look at the OpenFOAM-extend first to understand the FOAM approach to contact. My simulations involve soil-structure interaction, for which (my simulations) the contact problem is not of utmost significance. I can somehow define a weaker soil-zone (very thin) around the structure. It is usually done in FEM codes by considering elements of zero lengths with reduced material properties. Nevertheless, I take great interest in updates about the contact problem. Not to cause you so much trouble as things do not seem straightforward with contact in OF. I will let you know after I get my solver running so I may implement your contact segments in it. In the time being, I guess I'll delay focus on the frictional contact of soil-structure. Thanks and best regards, Hisham El Safti |

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