{"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>Hello, thank you for your reply.<\/p><p>No, I’d like to check that the following 2 simulations have the same result:<\/p><p>1) Simulation of a beam fixed on one end and <span style=”text-decoration: underline;”>subjected to gravity<\/span> (nlgeom, on because my material is hyperelastic, Yeoh order 2). The final stress is written to an .ist <\/em>file with the command inistate, write<\/strong>.<\/p><p>2) Simulation of the same beam fixed on the same side, <span style=”text-decoration: underline;”>without gravity<\/span>, but with prestress, corresponding to the final stresses of the previous simulation (read with the inistate, read<\/strong> command).<\/p><p>This works if I take a linear elastic material with small deformations (nlgeom,off<\/strong>), but it no longer works when nlgeom,on<\/strong> is activated. The simulation doesn’t converge because inistate applies the stress in 1 step on the first simulation, and this stress is too high. <\/p><p>My question is as follows: How do you apply a pre-stress (or a stress) as a load to a model when you’re in large deformations (Step 2 works)?  How do you apply this pre-stress over several iterations to help the model converge?<\/p><p>Thanks for your reply, Charlotte.<\/p><\/p>\n","protected":false},"template":"","class_list":["post-389524","reply","type-reply","status-publish","hentry"],"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