{"id":355085,"date":"2024-03-04T10:36:15","date_gmt":"2024-03-04T10:36:15","guid":{"rendered":"\/forum\/forums\/reply\/355085\/"},"modified":"2024-03-04T11:42:18","modified_gmt":"2024-03-04T11:42:18","slug":"355085","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/355085\/","title":{"rendered":"Reply To: Governing Equation for Deformation in nonlinear hyper-elastic material"},"content":{"rendered":"<p>&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;Hi,&lt;\/p&gt;&lt;p&gt;The governing equation for large deformation is same as in small deformation (div (Sigma)+ bodyforce =0), but the stress-strain relationship is found from a energy density functional, like neo-Hookean, Mooney- rivlin, yeoh model, etc. and the stress measures are different based on which configuration you are measuring the force and the corresponding area. You can access the course link below about hyperelastic materials.&lt;\/p&gt;&lt;p&gt;\/courses\/index.php\/courses\/large-deformation\/&lt;\/p&gt;&lt;p&gt;The details of energy density functional is given in the following link:&lt;\/p&gt;&lt;p&gt;https:\/\/ansyshelp.ansys.com\/account\/secured?returnurl=\/Views\/Secured\/corp\/v232\/en\/motion_pre\/Formulations_and_Parameters_1.html&lt;\/p&gt;&lt;p&gt;I hope this helps!&lt;\/p&gt;&lt;p&gt;Thank you,&lt;\/p&gt;&lt;p&gt;Aurojyoti.&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-355085","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,The governing equation for large deformation is same as in small deformation (div (Sigma)+ bodyforce =0), but the stress-strain relationship is found from a energy density functional, like neo-Hookean, Mooney- rivlin, yeoh model, etc. and the stress measures are different based on which configuration you are measuring the force and the corresponding area. You can\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/355085\/\" \/>\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: Governing Equation for Deformation in nonlinear hyper-elastic material | Ansys Learning Forum\" \/>\n\t\t<meta property=\"og:description\" content=\"Hi,The governing equation for large deformation is same as in small deformation (div (Sigma)+ bodyforce =0), but the stress-strain relationship is found from a energy density functional, like neo-Hookean, Mooney- rivlin, yeoh model, etc. and the stress measures are different based on which configuration you are measuring the force and the corresponding area. You can\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/355085\/\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2024-03-04T10:36:15+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2024-03-04T11:42:18+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Reply To: Governing Equation for Deformation in nonlinear hyper-elastic material | Ansys Learning Forum\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Hi,The governing equation for large deformation is same as in small deformation (div (Sigma)+ bodyforce =0), but the stress-strain relationship is found from a energy density functional, like neo-Hookean, Mooney- rivlin, yeoh model, etc. and the stress measures are different based on which configuration you are measuring the force and the corresponding area. 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