{"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 – Pretensioned bolts"},"content":{"rendered":"

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. <\/p>\n

There are various forces applied on the clamp device:<\/strong><\/span><\/p>\n

<\/p>\n

The model:<\/strong><\/span><\/p>\n

<\/p>\n

The bolt:<\/strong><\/span><\/p>\n

<\/p>\n

The mesh:<\/strong><\/span><\/p>\n

<\/p>\n

I keep getting the errors: <\/p>\n

An internal solution magnitude limit was exceeded. (Node Number 158886, Body Unknown, DOF UX) <\/strong><\/p>\n

and <\/p>\n

Solver pivot warnings or errors have been encountered during the solution. <\/strong><\/p>\n

I’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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t