{"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":"
Dear Ansys community,<\/div>\n
 <\/div>\n
I’m trying to model blood pressure acting on the blood vessel in Static structural. <\/div>\n
Blood vessel was modelled using 5 parameter mooney-rivlin model with two layer mesh, and the surrounding muscle was linear elastic. <\/div>\n
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 & outlets. Pressure was applied to the inner surface of blood vessel (yellow and green surfaces). <\/div>\n
<\/div>\n
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’s not helping.<\/div>\n
<\/div>\n
Any suggestions?<\/div>\n
 <\/div>\n
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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t