{"id":158158,"date":"2022-06-06T09:58:54","date_gmt":"2022-06-06T09:58:54","guid":{"rendered":"\/knowledge\/forums\/topic\/how-does-force-frictional-sliding-contact-behave-in-the-rigid-dynamic-solver\/"},"modified":"2022-06-06T09:58:54","modified_gmt":"2022-06-06T09:58:54","slug":"how-does-force-frictional-sliding-contact-behave-in-the-rigid-dynamic-solver","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-does-force-frictional-sliding-contact-behave-in-the-rigid-dynamic-solver\/","title":{"rendered":"How does force frictional sliding contact behave in the Rigid Dynamic solver ?"},"content":{"rendered":"<p>Force Frictional Sliding contact is not designed to model a sticking situation. It works well for sliding contact where the friction leads to a resisting force (opposed to the sliding velocity) which is directly proportional to the normal contact force Ft=mu*Fn.  In order to avoid integration difficulty with low sliding velocities (basically when the contact would ideally be sticking or close to sticking), the friction factor varies linearly between 0 and its nominal values if the sliding velocity is lower than a given velocity.<br \/>In summary,<br \/>If ||v||>=v_tol, Ft=mu*Fn<br \/>If ||v||<v_tol, Ft=mu*(||v||\/v_tol)*Fn<br \/>This velocity tolerance is internally computed from the contact radius among many other parameters.  Unfortunately, this tolerance cannot be obtained or set by the user. However, there is a command that affects its computation:<br \/>options=CS_SolverOptions()<br \/>options.VelocityToleranceFactor=1.0<br \/>The default value is 100. It allows to improve the behavior to be &#8220;closer&#8221; to a sticking contact but it won&#8217;t ever be perfectly sticking. With a factor=1 (a lower velocity tolerance), it will be possible to have lower sliding velocities, like an &#8220;almost sticking&#8221; contact status.<\/p>\n","protected":false},"template":"","class_list":["post-158158","topic","type-topic","status-publish","hentry","topic-tag-contact","topic-tag-dynamic","topic-tag-force","topic-tag-frictional","topic-tag-rigid","topic-tag-sliding","topic-tag-solver"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["06-06-2022 20:20"],"_bbp_forum_id":["27792"],"_bbp_likes_count":["1"],"_btv_view_count":["2293"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/158158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/158158\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=158158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}