{"id":372267,"date":"2024-07-17T06:45:44","date_gmt":"2024-07-17T06:45:44","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372267\/"},"modified":"2024-07-17T06:45:44","modified_gmt":"2024-07-17T06:45:44","slug":"372267","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372267\/","title":{"rendered":"Reply To: Delamination not occurring in an End Notched Flexural Modal"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;For the messages you encountered:&lt;\/p&gt;<\/p>\n<ol>\n<li>&lt;p&gt;<strong>Fracture Parameters Incorrect<\/strong>:&lt;\/p&gt;\n<ul>\n<li>This warning often indicates issues with the calculation of fracture mechanics parameters.&nbsp;<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-fracture-parameters-computed-during-solution-may-be-incorrect\/\" target=\"_blank\" rel=\"noopener\">Ensure that the crack tip nodes are not attached to unsupported element types<\/a>.&nbsp;<a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-fracture-parameters-computed-during-solution-may-be-incorrect\/\" target=\"_blank\" rel=\"noopener\">You might need to remove contact elements at the crack front if they are present.<\/a><\/li>\n<\/ul>\n<\/li>\n<li>&lt;p&gt;<strong>Contact Status Abrupt Change<\/strong>:&lt;\/p&gt;\n<ul>\n<li><a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-fracture-parameters-computed-during-solution-may-be-incorrect-2\/\" target=\"_blank\" rel=\"noopener\">This warning suggests that the contact status is rapidly changing between &ldquo;closed&rdquo; and &ldquo;far open&rdquo; without passing through &#8220;near open&#8221;. <\/a><a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-fracture-parameters-computed-during-solution-may-be-incorrect-2\/\" target=\"_blank\" rel=\"noopener\">You can try reducing the time step size or increasing the pinball radius to stabilize the contact status<\/a><a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-fracture-parameters-computed-during-solution-may-be-incorrect-2\/\" target=\"_blank\" rel=\"noopener\">&lt;sup class=&#8221;citation-sup&#8221;&gt;2&lt;\/sup&gt;<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li>&lt;p&gt;<strong>Reference Convergence Value Less Than Threshold<\/strong>:&lt;\/p&gt;\n<ul>\n<li><a href=\"https:\/\/bing.com\/search?q=ANSYS+warning+messages+fracture+parameters+incorrect\" target=\"_blank\" rel=\"noopener\">This warning indicates that the reference convergence value is very small, which can happen when applied loads are minimal<\/a>. <a href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/the-fracture-parameters-computed-during-solution-may-be-incorrect\/\">You can override the minimum reference value by specifying it under the nonlinear controls of the analysis settings<\/a>.<\/li>\n<\/ul>\n<\/li>\n<li>&lt;p&gt;<strong>Small Equation Solver Pivot Term<\/strong>:&lt;\/p&gt;\n<ul>\n<li><a href=\"https:\/\/ansyskm.ansys.com\/forums\/topic\/when-performing-a-fracture-analysis-with-a-pre-meshed-crack-the-simulation-stops-before-calculating-any-fracture-related-results-and-in-the-solve-out-the-following-warning-and-error-messages-are-issu\/feed\/\" target=\"_blank\" rel=\"noopener\">This warning usually points to a numerically unstable model, often due to large deformations or insufficient constraints<\/a>. <a href=\"https:\/\/ansyskm.ansys.com\/forums\/topic\/when-performing-a-fracture-analysis-with-a-pre-meshed-crack-the-simulation-stops-before-calculating-any-fracture-related-results-and-in-the-solve-out-the-following-warning-and-error-messages-are-issu\/feed\/\" target=\"_blank\" rel=\"noopener\">Ensure that your model is properly constrained and consider refining your mesh or adjusting the solution method<\/a>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>&lt;p&gt;Regards,&lt;\/p&gt;&lt;p&gt;Ashish Khemka&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-372267","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/372267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/reply"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/372267\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=372267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}