{"id":158007,"date":"2021-04-30T13:19:55","date_gmt":"2021-04-30T13:19:55","guid":{"rendered":"\/forum\/forums\/topic\/polymer-material-model-from-stress-strain-curve\/"},"modified":"2021-05-06T09:14:02","modified_gmt":"2021-05-06T09:14:02","slug":"polymer-material-model-from-stress-strain-curve","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/polymer-material-model-from-stress-strain-curve\/","title":{"rendered":"Polymer material model from stress-strain curve"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello everyone,<\/p>\n<p>At the Moment i&acute;m trying to build a material model for a polymer. I got tensile test data, and already figured the &quot;true stress-strain-curve&quot; out that i want to use. <\/p>\n<p>In the two attached pictures you can see the curve. Necking started at about epsilon = 0,05 mm\/mm.<\/p>\n<p>Now I am really wondering how to correctly implement the data in the Ansys Engineering Data.<\/p>\n<p>Right now my theory is to load the excel data until the necking point into the workbench with the uniaxial test data tool. Then i would try to get a good approximation via the hyperelastic curve-fitting tool. Afterwards i would define a yield point, and then describe the plasticity as a multinear or bilinear isotropic hardening.<\/p>\n<p>(I already tried to do so but i wasn&acute;t able to produce satisfying results&#8230;)<\/p>\n<p>So my question, is this the right way, or should i change fundamental steps in my approximation? <\/p>\n<p>And if this is the right way, which hyperelastic model would you recommend to describe a stress-strain curve like mine?<\/p>\n<p>I&acute;m thankful for every help,<\/p>\n<p>Regards<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/787\/2OCIZ7R9RU7L.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/787\/2OCIZ7R9RU7L.png\" alt=\"1.PNG\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-158007","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_old_reply_author_name_id":["Anonymous"],"_bbp_old_is_reply_anonymous_id":["false"],"_btv_view_count":["1684"],"_bbp_likes_count":["0"],"_bbp_subscription":["249117"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["158007"],"_bbp_forum_id":["27815"],"_bbp_engagement":["30928","185297"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["176992"],"_bbp_last_active_id":["176992"],"_bbp_last_active_time":["2021-05-06 09:14:02"]},"test":"mengineerm"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/158007","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\/158007\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=158007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}