Translations:FEM ConstraintContact/9/en


 * The contact stiffness can be estimated as 10 times the Young's modulus of the material for hard contact. The higher the value for contact stiffness, the harder the contact between surfaces.
 * The slave face is the face that penetrates into the master face and therefore experiences more deformation.
 * The *CONTACT PAIR card is used for modeling contact in CalculiX. The constraint uses Face-to-Face penalty contact and the contact formulation is explained in detail at http://web.mit.edu/calculix_v2.7/CalculiX/ccx_2.7/doc/ccx/node112.html
 * Overview of different contact types: https://forum.freecadweb.org/viewtopic.php?f=18&t=15699&start=90#p188736
 * Further interesting information:
 * https://forum.freecadweb.org/viewtopic.php?f=18&t=23102#p180709 and following posts !!!
 * https://forum.freecadweb.org/viewtopic.php?f=18&t=20276
 * https://forum.freecadweb.org/viewtopic.php?f=18&t=21331
 * https://forum.freecadweb.org/viewtopic.php?f=18&t=15699 (initial contact topic)