{"id":158117,"date":"2021-05-04T08:57:36","date_gmt":"2021-05-04T08:57:36","guid":{"rendered":"\/forum\/forums\/topic\/choosing-boundary-condition\/"},"modified":"2022-05-10T10:37:05","modified_gmt":"2022-05-10T10:37:05","slug":"choosing-boundary-condition","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/choosing-boundary-condition\/","title":{"rendered":"Choosing boundary condition"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hello,<\/p>\n<p>I am trying to setup a static structural simulation to test the behavior of a lens system with temperature change.<\/p>\n<p>The lens system is held in an Aluminum outer body (lets call it barrel), shown in the Figure attached. This outer body is clamped on an Aluminum plate which is heated up, and in turn heats the lens system.<\/p>\n<p>I know the forces that I want the clamp put on the barrel rim, so that can be set up a force boundary condition (BC) in the downward direction.<\/p>\n<p>I am confused between the other boundary condition. The lower part of the rim is in contact with the aluminum heating plate and my earlier thought was to put a zero displacement BC in the vertical direction but the system will expand in the vertical direction which makes zero displacement BC not applicable.<\/p>\n<p>Can anyone suggest if there is something that I can do to correctly represent the system as it is in the Figure?<\/p>\n<p>Should a contact condition between the heating plate and the barrel be sufficient to represent the system? <\/p>\n<p>Also, I am only using the barrel (with lenses and spacers) in my simulation. The heating plate and clamps are not included in the simulation. The idea is to represent them by BCs.<\/p>\n<p>The lenses and spacers inside the barrel are not shown.<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/452\/U0C75NDAFWH5.png\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/452\/U0C75NDAFWH5.png\" alt=\"1.png\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-158117","topic","type-topic","status-closed","hentry","topic-tag-boundary-conditions","topic-tag-static-structural","topic-tag-structural-and-thermal"],"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":["2200"],"_bbp_likes_count":["0"],"_bbp_subscription":["235110"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["158117"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","31263","185297"],"_bbp_voice_count":["3"],"_bbp_reply_count":["11"],"_bbp_last_reply_id":["177367"],"_bbp_last_active_id":["177367"],"_bbp_last_active_time":["2022-05-10 10:37:05"]},"test":"amit-pandeythi-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/158117","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\/158117\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=158117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}