{"id":403736,"date":"2025-01-06T14:37:44","date_gmt":"2025-01-06T14:37:44","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403736\/"},"modified":"2025-01-06T14:37:44","modified_gmt":"2025-01-06T14:37:44","slug":"403736","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403736\/","title":{"rendered":"Reply To: Compression of a rubber sample in LS Dyna ACT Workbench"},"content":{"rendered":"<p>&lt;p&gt;Hi Javat,&nbsp;&lt;\/p&gt;&lt;p&gt;You have not touched the necessary parameters to avoid penetration in your model: contact\/target penalty scale factor, using higher values may crash the solver so you need fine balance here. Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model.&nbsp;&lt;\/p&gt;&lt;p&gt;For softer materials such as rubber, you can try tet element as they have some elemental stiffness and are less prone to hourglassing start with tet 13 ( also need to set tet13v for accuracy ) and use tet10 for a bit more stiffness response.&nbsp;&lt;\/p&gt;&lt;p&gt;You can try SPH for rubber and see if it has improved response but use MLS approximation theory on MPP.&nbsp;&lt;\/p&gt;&lt;p&gt;Cheers, Ram&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-403736","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=\"Hi Javat, You have not touched the necessary parameters to avoid penetration in your model: contact\/target penalty scale factor, using higher values may crash the solver so you need fine balance here. Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. For softer materials such as rubber,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403736\/\" \/>\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=\"Reply To: Compression of a rubber sample in LS Dyna ACT Workbench | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi Javat, You have not touched the necessary parameters to avoid penetration in your model: contact\/target penalty scale factor, using higher values may crash the solver so you need fine balance here. Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. For softer materials such as rubber,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403736\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2025-01-06T14:37:44+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2025-01-06T14:37:44+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Compression of a rubber sample in LS Dyna ACT Workbench | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi Javat, You have not touched the necessary parameters to avoid penetration in your model: contact\/target penalty scale factor, using higher values may crash the solver so you need fine balance here. Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. 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Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. 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Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. 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Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. 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Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. For softer materials such as rubber,","og:url":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/403736\/","article:published_time":"2025-01-06T14:37:44+00:00","article:modified_time":"2025-01-06T14:37:44+00:00","twitter:card":"summary_large_image","twitter:title":"Reply To: Compression of a rubber sample in LS Dyna ACT Workbench | Ansys Learning Forum","twitter:description":"Hi Javat, You have not touched the necessary parameters to avoid penetration in your model: contact\/target penalty scale factor, using higher values may crash the solver so you need fine balance here. Also, do you need an Asymmetric behavior here as it creates _NODES_TO_SURFACE keyword and is unnecessary in your model. 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