{"id":43070,"date":"2020-04-21T15:16:02","date_gmt":"2020-04-21T15:16:02","guid":{"rendered":"\/forum\/forums\/topic\/hyperelastic-simulation-does-not-run-due-to-element-distortion\/"},"modified":"2020-04-21T15:16:02","modified_gmt":"2020-04-21T15:16:02","slug":"hyperelastic-simulation-does-not-run-due-to-element-distortion","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/hyperelastic-simulation-does-not-run-due-to-element-distortion\/","title":{"rendered":"Hyperelastic simulation does not run due to element distortion"},"content":{"rendered":"<p>Hello!<\/p>\n<p><\/p>\n<p>I have been trying to run a simulation on a relatively simple geometry all day. The simulation uses the Neoprene Rubber material (hyperelastic) and is intended to model the &#8216;flipping&#8217; of a dome inside out. The model is a surface model, with 0.5 mm thickness. The only boundary condition aside from pressure (~9 Pa applied) is a fixed support.&nbsp;<\/p>\n<p><\/p>\n<p>I have attempted the following things, but cannot acheive convergance due to &#8216;excessive distortion of elements&#8217;<\/p>\n<p><\/p>\n<p>&#8211; Decreasing mesh size &#8211; 0.8 mm yields optimal results, higher or lower causes the simulation to terminate earlier.&nbsp;<\/p>\n<p><\/p>\n<p>&#8211; weak spings\/Energy stabilisation &#8211; no change&nbsp;<\/p>\n<p><\/p>\n<p>&#8211; substeps: improved result up to a point. I tried increasing initial and minimum substeps. No results past 500 initial substeps<\/p>\n<p><\/p>\n<p>&#8211; Low order triangular mesh &#8211; doesn&#8217;t help, similar result<\/p>\n<p><\/p>\n<p>Please the&nbsp;<span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">.wbpz archive here:&nbsp;https:\/\/polybox.ethz.ch\/index.php\/s\/MY4VkCvr5vJ819N<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">Thank you!&nbsp;<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">Lewis&nbsp;<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">&nbsp;<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">I would really appreciate help, and for someone to point out where I am going wrong. Thank you!&nbsp;<\/span><\/p>\n<p><\/p>\n<p><span style=\"font-family: 'Open Sans', Arial, Helvetica, sans-serif; font-size: 15px;\">Lewis<\/span><\/p>\n","protected":false},"template":"","class_list":["post-43070","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["15251"],"_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"],"_btv_view_count":["1106"],"_bbp_subscription":["250269"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["43070"],"_bbp_forum_id":["27791"],"_bbp_engagement":["22","176098"],"_bbp_voice_count":["2"],"_bbp_reply_count":["6"],"_bbp_last_reply_id":["115245"],"_bbp_last_active_id":["115245"],"_bbp_last_active_time":["2020-05-21 13:44:50"]},"test":"lewisj"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/43070","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\/43070\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=43070"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}