{"id":165097,"date":"2021-12-25T03:00:12","date_gmt":"2021-12-25T03:00:12","guid":{"rendered":"\/forum\/forums\/topic\/linear-vs-nonlinear-analysis\/"},"modified":"2021-12-25T16:52:14","modified_gmt":"2021-12-25T16:52:14","slug":"linear-vs-nonlinear-analysis","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/linear-vs-nonlinear-analysis\/","title":{"rendered":"Linear vs. nonlinear analysis"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello.<\/p>\n<p>I am doing a static simulation in static structural and I have performed a linear simulation(using linear material) and then performed a non linear simulation( using a non linear material).<\/p>\n<p>After a convergence study, I selected a suitable mesh of 3 mm.<\/p>\n<p><\/p>\n<\/p>\n<p>I have used the aluminum alloy delivered by the ansys material library, which has a Sy=280 MPa (yield stress). For the linear simulation, I obtained a stress result of 630 MPa, and for the nonlinear simulation I obtained a stress of 310 MPa. <\/p>\n<p><\/p>\n<\/p>\n<p>However, I then changed the material to a titanium alloy which has a Sy=930 MPa (yield stress). And for the linear analysis I got 620MPa and for the nonlinear simulation I also got 620 MPa with negligible difference. <\/p>\n<p><\/p>\n<\/p>\n<p>Then, I changed to a structural steel material which has a Sy=250 MPa. In the linear simulation I got 621 MPa and in the nonlinear simulation I got a stress of 274 MPa.<\/p>\n<p>All the stresses I mentioned that were obtained correspond to the equivalent Von Mises stress.<\/p>\n<p>Who can explain me this phenomenon, I am confused with the results. Which results should I consider correctly? Is it related to the strength capacity of the material? That is, if the material supports the applied loads? <\/p>\n<p><\/p>\n<\/p>\n<p>Thank you.<\/p>\n","protected":false},"template":"","class_list":["post-165097","topic","type-topic","status-closed","hentry","topic-tag-ansys-mechanical","topic-tag-peteroznewman","topic-tag-post-processing","topic-tag-static-structural"],"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":["7670"],"_bbp_likes_count":["0"],"_bbp_subscription":["242246"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["165097"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","180472","242246"],"_bbp_voice_count":["3"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["201271"],"_bbp_last_active_id":["201271"],"_bbp_last_active_time":["2021-12-25 16:52:14"]},"test":"bastianlizamacatrilgmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/165097","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\/165097\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=165097"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}