{"id":36576,"date":"2019-07-16T12:49:08","date_gmt":"2019-07-16T12:49:08","guid":{"rendered":"\/forum\/forums\/topic\/ansys-non-linear-analysis-bilinear-hardening-for-plasticity\/"},"modified":"2019-07-16T12:49:08","modified_gmt":"2019-07-16T12:49:08","slug":"ansys-non-linear-analysis-bilinear-hardening-for-plasticity","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/ansys-non-linear-analysis-bilinear-hardening-for-plasticity\/","title":{"rendered":"Ansys non linear analysis &#8211; bilinear hardening for plasticity"},"content":{"rendered":"<p>Hello I wanted to simulate&nbsp; non linear analysis of a compression test of a cylinder rod compressing onto a thick auxetic structure, the materials have unknown properties so I carried out uniaxial tensile test to gather some data, I am trying to simulate the real experiment of the compression test to achieve a similar force threshold with a compression displacement of 20mm, on this particular structure at 20mm displacement along the y axis produced of a force of 300n approx , in ansys with applied bilinear hardening with positive integers I achieved the force to become 178N, which only consists of tensile parameters. The problem is I want to use negative integers of strain and stress to approximate the compressive behaviour but ansys does not allow this and shows yellow error bar over the data table. Is there a way to let ansys accept negative integers for hardening?<\/p>\n","protected":false},"template":"","class_list":["post-36576","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["8748"],"_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"],"_btv_view_count":["1828"],"_bbp_subscription":["241464"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["36576"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","160648","161424","166807"],"_bbp_voice_count":["4"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["92479"],"_bbp_last_active_id":["92479"],"_bbp_last_active_time":["2019-08-20 07:53:59"]},"test":"n0834237"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/36576","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\/36576\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=36576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}