Translations:FEM ConstraintContact/9/en


 * The contact stiffness can be estimated as 5 to 50 times the Young's modulus of the material. 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)