{"id":382813,"date":"2024-09-16T19:07:40","date_gmt":"2024-09-16T19:07:40","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/tiebreak-using-segment-set-for-contact-bw-20-noded-hexahedral-elements-2\/"},"modified":"2024-09-17T18:34:28","modified_gmt":"2024-09-17T18:34:28","slug":"tiebreak-using-segment-set-for-contact-bw-20-noded-hexahedral-elements-2","status":"publish","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/tiebreak-using-segment-set-for-contact-bw-20-noded-hexahedral-elements-2\/","title":{"rendered":"Tiebreak using Segment set for contact b\/w 20 noded Hexahedral elements"},"content":{"rendered":"<p>&lt;p&gt;&lt;p&gt;&lt;p&gt;Hello, I have been trying to use tiebreak contact (CONTACT_AUTOMATIC_ONE_WAY_SURFACE_TOSURFACE_TIEBREAK) [Option 9] with the 20 noded Hexahedral solid element (ELFORM 23). When I select the surfaces using the segment set approach- it keeps giving me an error that certain master, slave surfaces have not been not found. Because this didn&#8217;t work, I then tried defining tiebreak contact using the PARTIDs. But, with this approach the nodes on the middle of the edges don&#8217;t get selected and only the nodes on the corners are tied. I strongly prefer to use the segment set selection of tiebreak surfaces, and need to know to how to execute this for the 20 noded hexahedral elements.&lt;\/p&gt;&lt;p&gt;Also another associated issue is that when I use a regular a contact definition between two hex elements and apply a closing\/compressive load, there is interpenetration at the middle nodes (i.e. the nodes in the middle of the edge)- which should not occur. &lt;\/p&gt;&lt;p&gt;Can anyone share from LSDYNA support\/community help figure a solution to these problems? Thanks&lt;\/p&gt;&lt;\/p&gt;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-382813","topic","type-topic","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello, I have been trying to use tiebreak contact (CONTACT_AUTOMATIC_ONE_WAY_SURFACE_TOSURFACE_TIEBREAK) [Option 9] with the 20 noded Hexahedral solid element (ELFORM 23). When I select the surfaces using the segment set approach- it keeps giving me an error that certain master, slave surfaces have not been not found. 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When I select the surfaces using the segment set approach- it keeps giving me an error that certain master, slave surfaces have not been not found. 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When I select the surfaces using the segment set approach- it keeps giving me an error that certain master, slave surfaces have not been not found. 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Because this didn't work, I then tried defining"},"aioseo_meta_data":{"post_id":"382813","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"content","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"created":"2024-10-28 16:29:00","updated":"2026-09-17 01:43:24","ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/innovationspace.ansys.com\/forum\/topics\/\" title=\"Topics\">Topics<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tTiebreak using Segment set for contact b\/w 20 noded Hexahedral elements\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/innovationspace.ansys.com\/forum"},{"label":"Topics","link":"https:\/\/innovationspace.ansys.com\/forum\/topics\/"},{"label":"Tiebreak using Segment set for contact b\/w 20 noded Hexahedral elements","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/tiebreak-using-segment-set-for-contact-bw-20-noded-hexahedral-elements-2\/"}],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["128.175.19.147"],"_btv_view_count":["861"],"_bbp_topic_status":["unanswered"],"_edit_last":["252252"],"_bbp_subscription":["252252","13694"],"_bbp_topic_id":["382813"],"_bbp_forum_id":["27814"],"_bbp_engagement":["13694","252252"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["445579"],"_bbp_last_active_id":["445579"],"_bbp_last_active_time":["2025-11-04 17:11:26"]},"test":"pdsamueludel-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/382813","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\/382813\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=382813"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}