{"id":305383,"date":"2023-09-07T19:25:14","date_gmt":"2023-09-07T19:25:14","guid":{"rendered":"\/forum\/forums\/topic\/questions-about-the-general-procedure-of-fea\/"},"modified":"2023-09-07T19:45:18","modified_gmt":"2023-09-07T19:45:18","slug":"questions-about-the-general-procedure-of-fea","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/questions-about-the-general-procedure-of-fea\/","title":{"rendered":"Questions about the general procedure of FEA"},"content":{"rendered":"<p>Hello!<\/p>\n<p>My understanding is the general procedure of FEA works something like this (at least for some types of problems): the equations in FEA are written in terms of the displacements (something like Ku=F, where K is the global stiffness matrix created though summing many local element stiffness matrices, and F is a nodal forces vector), and the displacements are first solved for.&nbsp; Then the strain matrix (sometimes called the B matrix) is used to calculate strains from the displacement results, and matrix representing the relationship between stress and strain (called the D matrix in the theory reference) is used to calculate the stresses from the strains.<\/p>\n<p>Does this seem like a correct high-level assessment of the FEA procedure?<\/p>\n<p>Does the overall procedure change for transient or nonlinear analyses?&nbsp;<\/p>\n<p>Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-305383","topic","type-topic","status-closed","hentry","topic-tag-ansys-structural","topic-tag-equation","topic-tag-finite-element-analysis","topic-tag-theory"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["168004","13632"],"_bbp_author_ip":["23.52.43.88"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["588"],"_edit_lock":["1694115896:52623"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["305383"],"_bbp_forum_id":["27791"],"_bbp_engagement":["13632","168004"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["305417"],"_bbp_last_active_id":["305417"],"_bbp_last_active_time":["2023-09-07 21:53:47"]},"test":"rgdiscovery"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/305383","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\/305383\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=305383"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}