{"id":326300,"date":"2023-12-05T07:18:09","date_gmt":"2023-12-05T07:18:09","guid":{"rendered":"\/forum\/forums\/topic\/convergence-issue-with-hyperelastic-material\/"},"modified":"2023-12-05T07:18:09","modified_gmt":"2023-12-05T07:18:09","slug":"convergence-issue-with-hyperelastic-material","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/convergence-issue-with-hyperelastic-material\/","title":{"rendered":"Convergence issue with hyperelastic material"},"content":{"rendered":"<div>Dear Ansys community,<\/div>\n<div>&nbsp;<\/div>\n<div>I&#8217;m trying to model blood pressure acting on the blood vessel in Static structural.&nbsp;<\/div>\n<div>Blood vessel was modelled using 5 parameter mooney-rivlin model with two layer mesh, and the surrounding muscle was linear elastic.&nbsp;<\/div>\n<div>As shown in the picture below, fixed boundary was applied to the muscle surrounding the vessel wall, and frictionless condition to the muscle surrounding inlet &amp; outlets. Pressure was applied to the inner surface of blood vessel (yellow and green surfaces).&nbsp;<\/div>\n<div><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/12\/05-12-2023-1701760573-mceclip1.png\"><\/div>\n<div>I turned autotime stepping on with minimum number of steps of 100, and max of 400. However the solver failed to converge. I tried a few tricks I saw on the forum (KEYOPT, matid, 6, 1; KEYOPT, matid, 2, 1; NEQIT, 10; newton-raphson 3), but it&#8217;s not helping.<\/div>\n<div><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/12\/05-12-2023-1701760595-mceclip2.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/12\/05-12-2023-1701760593-mceclip3.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/12\/05-12-2023-1701760594-mceclip4.png\"><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/12\/05-12-2023-1701760593-mceclip5.png\"><\/div>\n<div>Any suggestions?<\/div>\n<div>&nbsp;<\/div>\n<div>Thanks,<\/div>\n","protected":false},"template":"","class_list":["post-326300","topic","type-topic","status-closed","hentry","topic-tag-ansysworkbench-ansys-staticstructural","topic-tag-convergence"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["178192","13386"],"_bbp_author_ip":["23.206.193.59"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["768"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["326300"],"_bbp_forum_id":["27791"],"_bbp_engagement":["13386","178192"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["326403"],"_bbp_last_active_id":["326403"],"_bbp_last_active_time":["2023-12-05 10:35:41"]},"test":"ningxin"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/326300","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\/326300\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=326300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}