{"id":389524,"date":"2024-10-14T15:08:13","date_gmt":"2024-10-14T15:08:13","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/389524\/"},"modified":"2024-10-14T15:08:13","modified_gmt":"2024-10-14T15:08:13","slug":"389524","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/389524\/","title":{"rendered":"Reply To: How to apply a stress as an initial load state ?"},"content":{"rendered":"<p>&lt;p&gt;Hello, thank you for your reply.&lt;\/p&gt;&lt;p&gt;No, I&#8217;d like to check that the following 2 simulations have the same result:&lt;\/p&gt;&lt;p&gt;1) Simulation of a beam fixed on one end and &lt;span style=&#8221;text-decoration: underline;&#8221;&gt;subjected to gravity&lt;\/span&gt; (nlgeom, on because my material is hyperelastic, Yeoh order 2). The final stress is written to an <em>.ist <\/em>file with the command <strong>inistate, write<\/strong>.&lt;\/p&gt;&lt;p&gt;2) Simulation of the same beam fixed on the same side, &lt;span style=&#8221;text-decoration: underline;&#8221;&gt;without gravity&lt;\/span&gt;, but with prestress, corresponding to the final stresses of the previous simulation (read with the <strong>inistate, read<\/strong> command).&lt;\/p&gt;&lt;p&gt;This works if I take a linear elastic material with small deformations (<strong>nlgeom,off<\/strong>), but it no longer works when <strong>nlgeom,on<\/strong> is activated. The simulation doesn&#8217;t converge because inistate applies the stress in 1 step on the first simulation, and this stress is too high.&nbsp;&lt;\/p&gt;&lt;p&gt;My question is as follows: How do you apply a pre-stress (or a stress) as a load to a model when you&#8217;re in large deformations (Step 2 works)?&nbsp; How do you apply this pre-stress over several iterations to help the model converge?&lt;\/p&gt;&lt;p&gt;Thanks for your reply, Charlotte.&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-389524","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"acf":[],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/replies\/389524","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\/389524\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=389524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}