{"id":162172,"date":"2023-01-25T07:34:30","date_gmt":"2023-01-25T07:34:30","guid":{"rendered":"\/knowledge\/forums\/topic\/how-to-reduce-contact-penetration\/"},"modified":"2023-07-31T12:36:31","modified_gmt":"2023-07-31T12:36:31","slug":"how-to-reduce-contact-penetration","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/how-to-reduce-contact-penetration\/","title":{"rendered":"How to reduce contact penetration?"},"content":{"rendered":"<p>The contact penetration, the solver assumes that the solution is converged when all the convergence criteria are met and when the penetration is within the tolerance (default is 10% of underlying element size). So, here are a couple of things that one can try: &#8211; Refine the mesh (especially on the contact side) &#8211; increase the contact normal stiffness (this may cause convergence issues, I&#8217;d say use 0.1 if the default does not work). &#8211; decrease the contact penetration tolerance (you can find this under the contact details, set it to a factor of 0.05 to reduce the tolerance to 5%) &#8211; Use normal Lagrange formulation (this will result in the least penetration but it can be a bit expensive).<\/p>\n","protected":false},"template":"","class_list":["post-162172","topic","type-topic","status-publish","hentry","topic-tag-4391","topic-tag-contact","topic-tag-contact-penetration","topic-tag-convergence","topic-tag-general","topic-tag-mechanical","topic-tag-nonlinear","topic-tag-structural-and-thermal","topic-tag-structural-mechanics"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_forum_id":["27795"],"_bbp_last_active_time":["1-24-2023  20:20:11"],"_bbp_author_ip":["23.56.168.180"],"_btv_view_count":["23651"],"siebel_km_number":["2055117"],"product_version":["19"],"km_published_date":["2018-06-30T04:47:40.000Z"],"family":["Structural Mechanics"],"application_name":["Mechanical"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/162172","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\/162172\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=162172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}