{"id":355342,"date":"2024-03-05T08:28:46","date_gmt":"2024-03-05T08:28:46","guid":{"rendered":"\/forum\/forums\/topic\/please-anyone-save-me-from-the-problem-which-is-contact-is-inactive\/"},"modified":"2024-03-05T08:28:46","modified_gmt":"2024-03-05T08:28:46","slug":"please-anyone-save-me-from-the-problem-which-is-contact-is-inactive","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/please-anyone-save-me-from-the-problem-which-is-contact-is-inactive\/","title":{"rendered":"Please anyone save me from the problem which is ‘Contact is Inactive’"},"content":{"rendered":"

Hi everyone, I have to simulate the Modal Analysis of a hydrogen storage tank.<\/p>\n

To sum up first, I found the message which is ‘Contact is inactive’ in the Contact Tool > Initial Information, as I attach below.<\/p>\n

<\/p>\n

 <\/p>\n

To explain about my model in more details, the geometry of model is almost made of shell (mid surface) and there are almost 1,000 Welds as well.
There are more contacts than shown in the above picture because I distinguished contacts with normally generated and contacts which is inactive. And I named them ‘error #’ which are inactive contacts. So all the contacts in the picture above don’t have normally generated contacts, I guess.<\/p>\n

I already used formulation of ‘MPC’, and I’ve set Pinball Radius more than twice the actual distance but sadly it doesn’t work. Also, I changed contact behavior from Program Controlled (which default is Auto Asymmetric) to Symmetric because It would be cause inactive contact problem as shown in the Initial Information.
And When ‘Trim Contact’ is set to ‘Program Controlled’ or ‘Yes’, Initial Information even don’t detect any contact in Initial Information. So I set ‘Trim Contact’ to ‘Off’. You can observe that ‘Trim Contact’ is set to ‘Off’ in the pictures that I attach below.<\/p>\n

These pictures are informations of the inactive contacts. I attach them wondering if it could be helpful.<\/p>\n

<\/p>\n

This shows mesh generated around the inactive contacts which is only one part of all.<\/p>\n

 <\/p>\n

<\/p>\n

Contact and Taget Surfaces<\/p>\n

<\/p>\n

Contact Bodies (4 Faces)<\/p>\n

 <\/p>\n

<\/p>\n

This shows ‘Details of Contact’. I tried changing ‘Fomulation’, ‘Pinball Region’, ‘Trim Contact’, and ‘Behavior’.<\/p>\n

<\/p>\n

This is ‘Details of Mesh’<\/p>\n

May I know how to solve this problem Sir?
Thank you very much in advance.<\/p>\n","protected":false},"template":"","class_list":["post-355342","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["59134","240"],"_bbp_author_ip":["23.52.43.81"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2325"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1709646331:41550"],"_bbp_topic_id":["355342"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","59134"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["355995"],"_bbp_last_active_id":["355995"],"_bbp_last_active_time":["2024-03-07 22:57:40"]},"test":"bookun607pusan-ac-kr"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355342","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\/355342\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=355342"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}