{"id":30846,"date":"2018-10-11T03:22:42","date_gmt":"2018-10-11T03:22:42","guid":{"rendered":"\/forum\/forums\/topic\/modeling-hyperelastics\/"},"modified":"2018-10-11T03:22:42","modified_gmt":"2018-10-11T03:22:42","slug":"modeling-hyperelastics","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/modeling-hyperelastics\/","title":{"rendered":"Modeling Hyperelastics"},"content":{"rendered":"<p>Hi all,<\/p>\n<p><\/p>\n<p>In doing FEA analysis with elastomers, I&#8217;ve read a good deal of tips and tricks in regards on how to approach to improve convergence:<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>https:\/\/caeai.com\/blog\/tips-tricks-fea-modeling-rubber-and-elastomers-part-2<\/p>\n<p><\/p>\n<p>https:\/\/caeai.com\/blog\/dealing-incompressibility<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>Most of these have common themes, including implementing&nbsp;<span style=\"color: #474646; font-family: nimbus-sans, Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;\">Selective reduced integration (B-Bar), Mixed Formulations, Mixed u-P formulations, enhanced strain formulations, adjusts to&nbsp;<\/span><span style=\"background-color: transparent; color: #474646; font-family: nimbus-sans, Arial, Helvetica, sans-serif; font-size: 16px; font-weight: 600; text-align: justify;\">volume compatibility constraint,<\/span><span style=\"color: #474646; font-family: nimbus-sans, Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;\">&nbsp;etc.. I&#8217;ve heard things as shear locking and volumetric locking being an issue of concern as well with these types of materials.<\/span><\/p>\n<p><\/p>\n<p><span style=\"color: #474646; font-family: nimbus-sans, Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;\">I&#8217;m not quite familiar with how to actually implement these kinds of techniques within ANSYS mechanical. I am aware of Commands via APDL that can be attached to the Geometries, is this where I could implement some of these above methods to attempt to aid in convergence?&nbsp; Could someone please provide me an example of how to introduce some stability and practical methods as above within my ANSYS to help get more towards convergence, generally speaking?<\/span><\/p>\n<p><\/p>\n<p><span style=\"color: #474646; font-family: nimbus-sans, Arial, Helvetica, sans-serif; font-size: 16px; text-align: justify;\">Thank you!<\/span><\/p>\n","protected":false},"template":"","class_list":["post-30846","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["3018"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["1661"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["30846"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","897","159194"],"_bbp_voice_count":["3"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["66264"],"_bbp_last_active_id":["66264"],"_bbp_last_active_time":["2018-10-11 18:32:36"],"_oembed_c5ac155b631a4d6fd4da0e54875d7f81":["{{unknown}}"],"_oembed_60d36f513fe1a56f6f38283f074f847d":["{{unknown}}"]},"test":"zjuv9021"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/30846","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics"}],"about":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/types\/topic"}],"version-history":[{"count":0,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/30846\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=30846"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}