{"id":374481,"date":"2024-07-31T12:32:28","date_gmt":"2024-07-31T12:32:28","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/double-pin-connection-internal-solution-magnitude-limit-was-exceeded\/"},"modified":"2024-07-31T12:32:28","modified_gmt":"2024-07-31T12:32:28","slug":"double-pin-connection-internal-solution-magnitude-limit-was-exceeded","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/double-pin-connection-internal-solution-magnitude-limit-was-exceeded\/","title":{"rendered":"Double pin connection &#8211; Internal solution magnitude limit was exceeded"},"content":{"rendered":"<p>Hello all,&nbsp;<\/p>\n<p>I am trying to solve a static structural analysis of a beam constrained by means of a double pin connection:<br \/><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/31-07-2024-1722426182-mceclip0.png\" width=\"673\" height=\"429\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/31-07-2024-1722426283-mceclip1.png\" width=\"725\" height=\"312\"><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/31-07-2024-1722428441-mceclip4.png\" width=\"1208\" height=\"702\"><\/p>\n<p>The pin connections are modeled with frictionless contacts:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/31-07-2024-1722426480-mceclip2.png\" width=\"1352\" height=\"806\"><\/p>\n<p>The model is fixed at the bottom and a symmetry b.c. (zero normal displacement) is used to reduce simulation time:&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/07\/31-07-2024-1722428304-mceclip3.png\" width=\"784\" height=\"602\"><\/p>\n<p>I am running into the following errors:<\/p>\n<p>&#8220;An internal solution magnitude limit was exceeded. (Node Number 89366, Body New_structure\\Lever, DOF UY) Please check your Environment for inappropriate load values or insufficient supports. &nbsp;You may select the offending object and\/or geometry via RMB on this warning in the Messages window. &nbsp;Please see the Troubleshooting section of the Help System for more information.&#8221;<\/p>\n<p>&#8221; <span style=\"font-size: 14pt\">The value of UY at node 89366 is 1.870118145E+12.&nbsp; It is greater than <\/span><span style=\"font-size: 14pt\">the current limit of 1000000 (which can be reset on the NCNV command). <\/span><span style=\"font-size: 14pt\">This generally indicates rigid body motion as a result of an <\/span><span style=\"font-size: 14pt\">unconstrained model.&nbsp; Verify that your model is properly constrained &#8220;<\/span><\/p>\n<p><span style=\"font-size: 14pt\">The error suggests that there is rigid body motion in my model, which I think is strange, because there are no initial gaps at the pin-hole connections (the pins are tangent to the holes).&nbsp;<\/span><\/p>\n<p>I have tried playing with the properties of the pin-hole connections (contact type, symmetric behavior, small sliding assumption) to see what might cause the error. Changing the connection type to rough or frictional (friction coefficient 0.2) results in the same errors. Only when the connection type is set to bonded, I get a solution. This is however not properly representing the physics as I am interested in the contact stresses at the pin connections.&nbsp;<\/p>\n<p>Any tips on how to solve this error?&nbsp;<\/p>\n<p>Best regards,<br \/>Karel<\/p>\n<p><span id=\"__symantecMPKIClientDetector\" style=\"display: none\">__PRESENT<\/span><span id=\"__symantecMPKIClientDetector\" style=\"display: none\">__PRESENT<\/span><span id=\"__symantecMPKIClientDetector\" style=\"display: none\">__PRESENT<\/span><\/p>\n","protected":false},"template":"","class_list":["post-374481","topic","type-topic","status-closed","hentry","topic-tag-frictionless-contact-1"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello all, I am trying to solve a static structural analysis of a beam constrained by means of a double pin connection:The pin connections are modeled with frictionless contacts:The model is fixed at the bottom and a symmetry b.c. 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