{"id":355427,"date":"2024-03-05T16:13:24","date_gmt":"2024-03-05T16:13:24","guid":{"rendered":"\/forum\/forums\/topic\/internal-solution-magnitude-limit-pretensioned-bolts\/"},"modified":"2024-03-05T16:13:24","modified_gmt":"2024-03-05T16:13:24","slug":"internal-solution-magnitude-limit-pretensioned-bolts","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/internal-solution-magnitude-limit-pretensioned-bolts\/","title":{"rendered":"Internal solution magnitude limit &#8211; Pretensioned bolts"},"content":{"rendered":"<p>I am doing a static structural analysis on a pipe support clamp. The clamp has an upper (1) and lower section (2) that is held together with two bolts. The two mating clamp faces have a frictional contact of 0.2. The bolt head also has a frictional contact with the top clamp face, while the threaded part of the shank uses a bonded contact with the lower clamp. I have applied a 6180N pretension to the bolts.&nbsp;<\/p>\n<p><span style=\"text-decoration: underline\"><strong>There are various forces applied on the clamp device:<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709655155-mceclip3.png\" width=\"706\" height=\"434\"><\/p>\n<p><span style=\"text-decoration: underline\"><strong>The model:<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709654132-mceclip0.png\" width=\"557\" height=\"482\"><\/p>\n<p><span style=\"text-decoration: underline\"><strong>The bolt:<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709654283-mceclip1.png\" width=\"483\" height=\"303\"><\/p>\n<p><span style=\"text-decoration: underline\"><strong>The mesh:<\/strong><\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/03\/05-03-2024-1709655029-mceclip2.png\" width=\"671\" height=\"564\"><\/p>\n<p>I keep getting the errors:&nbsp;<\/p>\n<p><strong>An internal solution magnitude limit was exceeded. (Node Number 158886, Body Unknown, DOF UX)&nbsp;<\/strong><\/p>\n<p>and&nbsp;<\/p>\n<p><strong>Solver pivot warnings or errors have been encountered during the solution.&nbsp;<\/strong><\/p>\n<p>I&#8217;m not sure what is causing these errors as the other pretensions I have for the rest of the bolts in the model all allow it to solve fine. Any ideas? Thanks<\/p>\n","protected":false},"template":"","class_list":["post-355427","topic","type-topic","status-closed","hentry","topic-tag-bolt","topic-tag-bolt-pretension","topic-tag-error","topic-tag-static-structural"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["23.52.43.16"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["666"],"_bbp_topic_status":["unanswered"],"_bbp_likes_count":["0"],"_bbp_subscription":["13386","20905","170445"],"_bbp_topic_id":["355427"],"_bbp_forum_id":["27791"],"_bbp_engagement":["0","13386","20905","170445"],"_bbp_voice_count":["4"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["355749"],"_bbp_last_active_id":["355749"],"_bbp_last_active_time":["2024-03-06 19:06:28"]},"test":""}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/355427","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\/355427\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=355427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}