{"id":343748,"date":"2024-01-09T02:33:54","date_gmt":"2024-01-09T02:33:54","guid":{"rendered":"\/forum\/forums\/reply\/343748\/"},"modified":"2024-01-09T02:33:54","modified_gmt":"2024-01-09T02:33:54","slug":"343748","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/343748\/","title":{"rendered":"Reply To: Ansys usercreep subroutine"},"content":{"rendered":"<p>&lt;p&gt;Hi John, thank you for your response. My question is not about how the usercreep subroutine works. I understabd that it is based on strain hardening model of primary creep. May be my question in the original post is unclear. Let me elaborate.&lt;\/p&gt;&lt;p&gt;I am trying to understand the implicit formulation of the creep function here. To be specific, I am trying to understand the calculation logic used for &#8220;delcr&#8221;. If it is an implicit formulation (I guess it is),&lt;\/p&gt;&lt;p&gt;delcr = e_cr(n+1) &#8211; e_cr(n) = C1*(sigma(n+1)^C2)*(e_cr(n+1)^C3)*exp(-C4\/T(n+1))*delta_t&lt;\/p&gt;&lt;p&gt;where n indicates the current time step and delta_t = t(n+1)-t(n). I expect the formulation integrates the creep function to eliminate the (n+1) terms and solve for the delcr. That is why there is a long &#8220;if-else&#8221; logic to address different scenarios. I am not able to understand how the eauations used for &#8220;delcr&#8221; calculations are arrived at. Explanation of the same is not available in the theory manual or user programmer&#8217;s guide&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-343748","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/343748","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\/343748\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=343748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}