{"id":33353,"date":"2019-02-16T10:09:59","date_gmt":"2019-02-16T10:09:59","guid":{"rendered":"\/forum\/forums\/topic\/defining-load-on-circular-region\/"},"modified":"2019-02-16T10:09:59","modified_gmt":"2019-02-16T10:09:59","slug":"defining-load-on-circular-region","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/defining-load-on-circular-region\/","title":{"rendered":"defining load on circular region"},"content":{"rendered":"<p>Hello,<\/p>\n<p><\/p>\n<p>I am trying to define boundary conditions on midsurface according to following picture&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/b52b263f-1db2-4f6c-a2d6-a92e014c7143\/8684a780-6fc2-484f-8845-a9f600a595d9_forummmm.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p>radius of inner circle is 0,2127m, outer circle: 0,8508m&nbsp; and the thickness of membrane (modelled as a midsurface) is 0,001metres.<br \/>Youngs modulus of material is E=11,9*10^10 Pa, density is 790kg\/m^3.&nbsp;<\/p>\n<p>The goal is to <strong>create uniform normal tension 11,9N\/mm in whole membrane<\/strong> (create pretension for further modal analysis).<\/p>\n<p><\/p>\n<p>Red arrows in the picture represents uniformly distrubuted tension (11,9N\/mm), normal to inner circle. Outer circle is clamped.<\/p>\n<p>It is not difficult to define clamped (outer) edge, however i dont know how to define this tension, which is normal to inner edge.<\/p>\n<p>I created cylindrical coordinate system, however i have problem to define direction of tension (radial direction).&nbsp;<\/p>\n<p><\/p>\n<p>In this picture You can see what i got:&nbsp;<img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/b52b263f-1db2-4f6c-a2d6-a92e014c7143\/54b7c102-0545-43af-902b-a9f600a6cf63_forum2.jpg?width=690&amp;upscale=false\" alt=\"\"><\/p>\n<p>The problem is, tension is applied in x-axis. Not in radial direction. There has to be an easy way how to define radial direction.<\/p>\n","protected":false},"template":"","class_list":["post-33353","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["5525"],"_bbp_old_topic_author_name_id":["Anonymous"],"_bbp_old_is_topic_anonymous_id":["false"],"_bbp_old_closed_status_id":["publish"],"_bbp_author_ip":[null],"_bbp_old_sticky_status_id":["normal"],"_bbp_likes_count":["0","0","0","0","0"],"_btv_view_count":["549"],"_bbp_subscription":["236794"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["33353"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","158123"],"_bbp_voice_count":["2"],"_bbp_reply_count":["7"],"_bbp_last_reply_id":["78093"],"_bbp_last_active_id":["78093"],"_bbp_last_active_time":["2019-02-17 03:20:51"]},"test":"kravky"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/33353","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\/33353\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=33353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}