{"id":356218,"date":"2024-03-09T20:17:22","date_gmt":"2024-03-09T20:17:22","guid":{"rendered":"\/forum\/forums\/topic\/effetive-stress-vs-strain-curve-not-as-expected\/"},"modified":"2024-03-09T20:23:43","modified_gmt":"2024-03-09T20:23:43","slug":"effetive-stress-vs-strain-curve-not-as-expected","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/effetive-stress-vs-strain-curve-not-as-expected\/","title":{"rendered":"effetive stress vs strain curve not as expected"},"content":{"rendered":"

Hi<\/p>\n

I used “MAT_PLASTIC_KINEMATIC model to model a pipe-tank simulation. The Mat card looks like below:<\/p>\n

<\/a><\/p>\n

I am applying 0.305 m displacement in +Y direction to represent sliding which looks like below:<\/p>\n

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 <\/p>\n

However, when I checked the effective stress at pipe-tank connection nodes, it seems they are not behaving as expected. I checked effective strain at a certain element which has maximum effective stress (at connection between tank and bottom), it looks like below:<\/p>\n

<\/a><\/p>\n

 <\/p>\n

<\/a><\/p>\n

<\/a><\/p>\n

My yield stress was 450 MPa and E = 200 GPa. My yield strain is 0.092. So, @0.092 the stress should be 450 MPa, right? Do you know, why the stress-strain does not look okay? To let you know, I was applying prescribed motion by selecting all bottom nodes of tank in Y direction.<\/p>\n

 <\/p>\n

But in other case, when I apply prescribed motion in Z direction to represent flotation of tank, I get expected results which looks below:<\/p>\n

<\/p>\n

<\/p>\n","protected":false},"template":"","class_list":["post-356218","topic","type-topic","status-closed","hentry","topic-tag-lsdyna"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["37124","13468","3136"],"_bbp_author_ip":["23.52.43.88"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["410"],"_bbp_topic_status":["unanswered"],"_edit_lock":["1710015520:190093"],"_bbp_topic_id":["356218"],"_bbp_forum_id":["27814"],"_bbp_engagement":["3136","13468","37124"],"_bbp_voice_count":["3"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["356890"],"_bbp_last_active_id":["356890"],"_bbp_last_active_time":["2024-03-13 15:25:14"]},"test":"mmia1lsu-edu"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/356218","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":2,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/356218\/revisions"}],"predecessor-version":[{"id":356220,"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/356218\/revisions\/356220"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=356218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}