{"id":441393,"date":"2025-09-14T02:27:20","date_gmt":"2025-09-14T02:27:20","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/contact-treatment-in-intermittent-modal-analysis-in-ls-dyna\/"},"modified":"2025-09-14T02:27:20","modified_gmt":"2025-09-14T02:27:20","slug":"contact-treatment-in-intermittent-modal-analysis-in-ls-dyna","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/contact-treatment-in-intermittent-modal-analysis-in-ls-dyna\/","title":{"rendered":"Contact Treatment in Intermittent modal analysis in LS-Dyna"},"content":{"rendered":"<p>&lt;p&gt;How does ls-dyna handle contact after a pre-stress in a modal analysis?&nbsp; &nbsp;Based on my simple model test, it doesnt&#8217; seem to register the contact status at the start of an eigenvalue analysis.&nbsp; &nbsp;I use control_implicit_eigenvalue with a negative load cuve ID to define when to extract the modes.&nbsp;&lt;\/p&gt;&lt;p&gt;Ansys Mechanical\/MAPDL has options to treat the frictional contact as bonded.&nbsp; &nbsp; Does this option exist inside LS-Dyna?&nbsp; I can&#8217;t find it but I want to ask to see if others know.&nbsp;&lt;\/p&gt;&lt;p&gt;Thanks&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-441393","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_forum_id":["27814"],"_bbp_topic_id":["441393"],"_bbp_author_ip":["2601:447:c17f:9600:f454:d876:89db:e076"],"_bbp_last_reply_id":["441498"],"_bbp_last_active_id":["441498"],"_bbp_last_active_time":["2025-09-16 06:16:24"],"_bbp_reply_count":["3"],"_bbp_reply_count_hidden":["0"],"_bbp_voice_count":["2"],"_bbp_engagement":["480261","13468"],"_btv_view_count":["410"],"_bbp_topic_status":["unanswered"],"_bbp_subscription":["13468","480261"]},"test":"64872acced255c930764e49420794aef51a32d56"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/441393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/441393\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=441393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}