{"id":251754,"date":"2023-02-27T16:38:02","date_gmt":"2023-02-27T16:38:02","guid":{"rendered":"\/forum\/forums\/reply\/251754\/"},"modified":"2023-02-27T16:41:07","modified_gmt":"2023-02-27T16:41:07","slug":"251754","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/251754\/","title":{"rendered":"Reply To: Soil container modeling &#8211; Mohr Coulomb (Material)"},"content":{"rendered":"<p>&lt;p&gt;Dear Maria Fernanda,&lt;\/p&gt;&lt;p&gt;Try setting up Automatic Time Stepping and using an Initial and Minimum Substep to be 1000. That might help it converge for at least a few substeps.&lt;\/p&gt;&lt;p&gt;I have a little experience with the Mohr-Coulomb material model. One way to gain experience with the material model is with a unit cube. Use Frictionless support on three sides of the cube that share one corner. On one opposite face, apply a Displacement load such as a small amount of compression or a small amount of tension. Mesh the cube with 1 linear element so there are only 8 nodes. See what happens.&lt;\/p&gt;&lt;p&gt;In the model of the stacked rubber sheets that has rectangular sheet on the bottom representing soil, change the material from soil to a linear elastic isotropic material. Solve this and look at the stress on the sides of the &ldquo;soil&rdquo; block. That block has a Fixed Support on the bottom. How is it connected to the rubber sheet touching it?&nbsp; Is it Bonded Contact?&nbsp; Look at the side walls of that &ldquo;soil&rdquo; block. Are they bulging out with the weight of the rubber above it? Maybe the reason this model will not converge with a M-C soil material is because stress develops in the material which it cannot support.&lt;\/p&gt;&lt;p&gt;What might work is to increase the soil block by 4 times its current dimensions in length, width and depth. Now the side walls are far from the rubber block. Apply a Fixed Support to the side wall of the soil block as well as the bottom face. Please let me know what you find out.&lt;\/p&gt;&lt;p&gt;Regards,&lt;\/p&gt;&lt;p&gt;Peter&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-251754","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Dear Maria Fernanda,Try setting up Automatic Time Stepping and using an Initial and Minimum Substep to be 1000. That might help it converge for at least a few substeps.I have a little experience with the Mohr-Coulomb material model. One way to gain experience with the material model is with a unit cube. 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