{"id":301949,"date":"2023-08-17T16:23:30","date_gmt":"2023-08-17T16:23:30","guid":{"rendered":"\/forum\/forums\/topic\/analysis-of-a-bolt-during-initial-loading\/"},"modified":"2023-08-19T05:46:03","modified_gmt":"2023-08-19T05:46:03","slug":"analysis-of-a-bolt-during-initial-loading","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/analysis-of-a-bolt-during-initial-loading\/","title":{"rendered":"Analysis of a non-standard geometry bolt during initial loading"},"content":{"rendered":"

Hi,<\/p>\n

I am trying to analyse a non standard geometry bolt when a preload is applied to see at what load it will fail and evetually determine a suitable torque to prevent bolt failing on assembly. The bolt is a hollow banjo bolt with an M6 thread and 1mm pitch.<\/span><\/p>\n

Due to its geometry i cannot apply standard hand calcs so hoped i could put a basic simulation together inspired by the paper “Finite element analysis of relationship between tightening torque and initial load of bolted connections”<\/span><\/p>\n

Is it possible to simulate applying a torque and hence preload to the joint and analyse the bolt? my attempts to replicate the above paper have been nothing short of disasterous.<\/span><\/p>\n

Even when i supress the model to just the bolt and apply a small displacement to replicate the bolt stretching by 0.1 mm, the stress results are up to extreme with values well into the 1000s of MPa.<\/span><\/s> EDIT:stress reaction is now OK by fixing my materials and applying a cylinderical support with axial and tangential freedom. Still cannot figure out how to apply a working torque<\/span><\/p>\n

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 <\/p>\n

 <\/p>\n","protected":false},"template":"","class_list":["post-301949","topic","type-topic","status-closed","hentry","topic-tag-mechanicalworkbench-1","topic-tag-ansys-mechanical","topic-tag-bolt","topic-tag-bolt-modelling-1","topic-tag-Screw-1","topic-tag-threads-2","topic-tag-torque"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["290877","200"],"_bbp_author_ip":["96.7.218.223"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["500"],"_edit_lock":["1692423539:226607"],"_bbp_likes_count":["1"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["301949"],"_bbp_forum_id":["27791"],"_bbp_engagement":["200","290877"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["302205"],"_bbp_last_active_id":["302205"],"_bbp_last_active_time":["2023-08-19 05:38:15"]},"test":"zy946145ou-ac-uk"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/301949","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\/301949\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=301949"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}