{"id":166799,"date":"2023-04-05T14:32:09","date_gmt":"2023-04-05T14:32:09","guid":{"rendered":"\/knowledge\/forums\/topic\/what-is-cause-of-following-warning-message-and-how-to-overcome-the-same-the-maximum-contact-stiffness-is-too-big-this-may-affect-the-accuracy-of-the-results-you-may-need-to-scale-the-force-unit-in\/"},"modified":"2023-07-31T12:32:10","modified_gmt":"2023-07-31T12:32:10","slug":"what-is-cause-of-following-warning-message-and-how-to-overcome-the-same-the-maximum-contact-stiffness-is-too-big-this-may-affect-the-accuracy-of-the-results-you-may-need-to-scale-the-force-unit-in","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/knowledge\/forums\/topic\/what-is-cause-of-following-warning-message-and-how-to-overcome-the-same-the-maximum-contact-stiffness-is-too-big-this-may-affect-the-accuracy-of-the-results-you-may-need-to-scale-the-force-unit-in\/","title":{"rendered":"What is cause of following warning message and how to overcome the same:  The maximum contact stiffness is too big. This may affect the accuracy of the results. You may need to scale the force unit in the model.How do I scale the force unit."},"content":{"rendered":"<p>\u200bThis is a limitation of penalty based contact. This warning occurs when normal contact stiffness (FKN) is higher than 10^16. To remove this issue we need to change the &#8220;unit system&#8221; in Mechanical. By defaults the unit of normal contact stiffness (FKN) is FORCE\/LENGTH^3. If we change the (m kg N..) unit system to (mm kg N..) unit system the new FKN value will be 10^(-9) times the previous one.\u200b  You may also try to change the contact algorithm.<\/p>\n","protected":false},"template":"","class_list":["post-166799","topic","type-topic","status-publish","hentry","topic-tag-4422","topic-tag-contact","topic-tag-mechanical","topic-tag-structural-and-thermal","topic-tag-structural-mechanics","topic-tag-thermal"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_wp_page_template":["default"],"_bbp_last_active_time":["5\/4\/2023 20:20"],"_bbp_forum_id":["27795"],"_bbp_author_ip":["209.182.204.162"],"_btv_view_count":["4718"],"siebel_km_number":["2054232"],"product_version":["18"],"km_published_date":["2018-04-19T00:00:00.000Z"],"family":["Structural Mechanics"],"application_name":["Mechanical"]},"test":"articlesansys-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/topics\/166799","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\/166799\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/knowledge\/wp-json\/wp\/v2\/media?parent=166799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}