{"id":350423,"date":"2024-02-11T12:41:25","date_gmt":"2024-02-11T12:41:25","guid":{"rendered":"\/forum\/forums\/topic\/pressure-direction-problems-on-shell-elements\/"},"modified":"2024-02-11T12:41:25","modified_gmt":"2024-02-11T12:41:25","slug":"pressure-direction-problems-on-shell-elements","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/pressure-direction-problems-on-shell-elements\/","title":{"rendered":"Pressure direction problems on shell elements"},"content":{"rendered":"<p>Hello, I&#8217;ve been struggling with applying a pressure load to a shell element for a while. I&#8217;m trying to simulate an outward pressure on a plane&acute;s frame, but the results make no sense to me. The propper setup of loads is displayed in the next picture, while both lateral sides are fixed:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/11-02-2024-1707655015-EnunciadoMEF.png\" alt=\"\" width=\"227\" height=\"203\"><\/p>\n<p>If I apply a comun pressure, since it is an imported geometry, some loads appear to be facing outwards and some others inward, so I&#8217;ve been told to change sign of the pressure applied to those faced in the wrong direction (inward). However, If I do so, I get the second picture&#8217;s results, which, I&#8217;m told are the right solution. There I can see the parts I changed the load on are going down and those who I didnt change going up, when all should have the same response, an upward bending.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/11-02-2024-1707655237-mceclip0.png\" width=\"493\" height=\"370\"><\/p>\n<p>So, instead, I went back and give every surface the same load and sign, getting the las picture&#8217;s results, which make a lot more sense to me, but I&#8217;m told that is not correct. Can someone explain what is going on with the pressure load direction and how is it posible that a positive pressure results in an opposite bending?<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2024\/02\/11-02-2024-1707655271-mceclip1.png\" width=\"501\" height=\"379\"><\/p>\n<p>Thank you for your time<\/p>\n","protected":false},"template":"","class_list":["post-350423","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["338968","240"],"_bbp_author_ip":["23.206.193.59"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1830"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["350423"],"_bbp_forum_id":["27790"],"_bbp_engagement":["240","338968"],"_bbp_voice_count":["2"],"_bbp_reply_count":["8"],"_bbp_last_reply_id":["350928"],"_bbp_last_active_id":["350928"],"_bbp_last_active_time":["2024-02-12 23:44:19"]},"test":"egarjubupv-edu-es"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/350423","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\/350423\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=350423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}