![](\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/14-04-2023-1681495392-mceclip0.png\")
![](\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/14-04-2023-1681496143-mceclip4.png\")
<\/p>\nHi! I am trying to run a static analysis on an oil storage tank, the geometry was 3D scanned, and postprocesed to create a surface, the surface was splitted into 9 different bodies in order to assign different thickness to each shell. I’m using a fixed support in the base of the tank, a displacement support in the top, edge-edge automatic contacts, and hydrostatic presure in all the faces as showed in the following image:<\/p>\n
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If I run the analysis just like that in a perfect cylinder it works just fine:<\/p>\n
![](\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/14-04-2023-1681495543-mceclip1.png\")
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But in the scanned surface everything fails:<\/p>\n
![](\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/14-04-2023-1681495764-mceclip2.png\")
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I tried using large deflection on and it gets better but the thing is I don’t know how it works, and if this problem need to use that setting. So mi first question would be. I need to use large deflection? when I have to use this setting?<\/strong><\/em><\/p>\n Using Large deflection On:<\/strong><\/p>\n Also, someone recommended me use non-linear structural steel, but again, I don’t know if that is correct and I if I should use it in this kind of problems. When do you recommend using non-linear materials?<\/em><\/strong><\/p>\n Is there anything else I could be missing in order to solve this problem accurately?<\/strong><\/em><\/p>\n Thank you!<\/p>\n","protected":false},"template":"","class_list":["post-279561","topic","type-topic","status-closed","hentry","topic-tag-ansysworkbench-ansys-staticstructural","topic-tag-3d","topic-tag-api","topic-tag-beams-and-shells","topic-tag-hydrostatic","topic-tag-large-deflection","topic-tag-MeshCylinderTank-1","topic-tag-non-linear","topic-tag-shell","topic-tag-storage"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["280767","240"],"_bbp_author_ip":["23.56.168.190"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1549"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["279561"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","280767"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["279590"],"_bbp_last_active_id":["279590"],"_bbp_last_active_time":["2023-04-15 02:27:42"]},"test":"diego-molinamail-escuelaing-edu-co"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/279561","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\/279561\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=279561"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![](\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/04\/14-04-2023-1681496238-mceclip6.png\")
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