{"id":390410,"date":"2024-10-18T12:50:09","date_gmt":"2024-10-18T12:50:09","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-not-able-to-converge\/"},"modified":"2024-10-24T08:32:04","modified_gmt":"2024-10-24T08:32:04","slug":"simulation-not-able-to-converge","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-not-able-to-converge\/","title":{"rendered":"Simulation not able to converge"},"content":{"rendered":"<p>&lt;p&gt;Hello,&lt;\/p&gt;&lt;p&gt;Im trying to run a simple simulation of symmetry. One plastic plate bolted to a metalic side bar. A 2000 newton force is applied to the internal face of the plate in -Y direction and the bolts have a pretension of 3500 newtons each. I&acute;ve run the simulation before without pretension but all contacts where bonded, and it runs fast, about 25 mins to run with 165K elements. I made a few runs changing to frictional and it took about 2 hours to finish.&lt;\/p&gt;&lt;p&gt;Large deflections are on, 3 steps (load the pretension, lock, and finally apply the external force), autostepping (tried with 50 initial, 25 minimum and 500 maximum &#8211; didn<code>t work), solver programmed controlled (tried direct but same).&lt;\/p&gt;&lt;p&gt;&lt;img src=&quot;https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729254846-mceclip0.png&quot; width=&quot;520&quot; height=&quot;276&quot;&gt;&lt;img src=&quot;https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729254964-mceclip1.png&quot; width=&quot;690&quot; height=&quot;205&quot;&gt;&lt;\/p&gt;&lt;p&gt;&lt;img src=&quot;https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729255376-mceclip4.png&quot; width=&quot;1232&quot; height=&quot;425&quot;&gt;&lt;\/p&gt;&lt;p&gt;&amp;nbsp;&lt;\/p&gt;&lt;p&gt;I made the local coordinate system to cut the bolt just between the end of the side bar internal face and the plate side face.&lt;\/p&gt;&lt;p&gt;&lt;img src=&quot;https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729255183-mceclip2.png&quot; width=&quot;922&quot; height=&quot;438&quot;&gt;&lt;\/p&gt;&lt;p&gt;It<\/code>s been like two hours and it hasn`t even finished the first substep.&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729255305-mceclip3.png\" width=\"1037\" height=\"572\" \/>&lt;\/p&gt;&lt;p&gt;Without large deflections, I got a result but it was weird.&lt;\/p&gt;&lt;p&gt;The bolt penetrated it self and when inside out.&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729255711-blobid0.png\" alt=\"\" width=\"691\" height=\"265\" \/>&lt;\/p&gt;&lt;p&gt;<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729255757-blobid1.png\" alt=\"\" width=\"725\" height=\"398\" \/>&lt;\/p&gt;&lt;p&gt;Any idea what is happening or what am I missing?&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-390410","topic","type-topic","status-closed","hentry","topic-tag-bolt-pretension"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Hello,Im trying to run a simple simulation of symmetry. One plastic plate bolted to a metalic side bar. A 2000 newton force is applied to the internal face of the plate in -Y direction and the bolts have a pretension of 3500 newtons each. I\u00b4ve run the simulation before without pretension but all contacts where\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-not-able-to-converge\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.10\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Ansys Learning Forum | Ansys Innovation Space\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Simulation not able to converge | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hello,Im trying to run a simple simulation of symmetry. One plastic plate bolted to a metalic side bar. A 2000 newton force is applied to the internal face of the plate in -Y direction and the bolts have a pretension of 3500 newtons each. I\u00b4ve run the simulation before without pretension but all contacts where\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/simulation-not-able-to-converge\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729255305-mceclip3.png\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/wp-content\/uploads\/sites\/2\/2024\/10\/18-10-2024-1729255305-mceclip3.png\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-10-18T12:50:09+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-10-24T08:32:04+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Simulation not able to converge | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hello,Im trying to run a simple simulation of symmetry. One plastic plate bolted to a metalic side bar. A 2000 newton force is applied to the internal face of the plate in -Y direction and the bolts have a pretension of 3500 newtons each. 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