{"id":161961,"date":"2021-09-06T01:11:33","date_gmt":"2021-09-06T01:11:33","guid":{"rendered":"\/forum\/forums\/topic\/what-is-better-to-use-fixed-support-or-compression-support\/"},"modified":"2021-09-06T16:21:48","modified_gmt":"2021-09-06T16:21:48","slug":"what-is-better-to-use-fixed-support-or-compression-support","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/what-is-better-to-use-fixed-support-or-compression-support\/","title":{"rendered":"What is better to use, fixed support or compression support?"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hi All,<\/p>\n<p>I am modelling a simple rectangular section (geometry from ASTM D695) in an attempt to compare the creep characteristics of the model to practical values recorded. Before being able to complete this, however, I am running into an issue of the material failing at stresses lower than that recorded practically when I use a fixed support, which I believe is due to induced shear stresses.<\/p>\n<p>In reality the sample is loaded at one end and compressed, upon switching to the compression support the material no longer fails but the deformation of the material is not distributed in the way I would expect and despite the simulation running I am getting a pivot warning and warning that there are not enough constraints. Originally I had the load applied as a force to a single face but even using a pressure on the same face the distribution of deformation is not uniform. This doesn&#039;t happen when I use the fixed support, in this case the deformation is evenly spread along the face.<\/p>\n<p>Can anyone advise given the loading situation whether one of these assumptions is incorrect? I thought that the issue may be due to the mesh size but I am not sure and am relatively new to the software.<\/p>\n<p>Thanks.<\/p>\n<div class=\"embedExternal embedImage\">\n<div class=\"embedExternal-content\">\n<a class=\"embedImage-link\" href=\"\/forum\/wp-content\/uploads\/forum-uploads\/476\/3RRU5FVSYO2X.jpg\" rel=\"nofollow noopener\" target=\"_blank\"><br \/>\n<img decoding=\"async\" class=\"embedImage-img\" src=\"\/forum\/wp-content\/uploads\/forum-uploads\/476\/3RRU5FVSYO2X.jpg\" alt=\"Compression1.JPG\" \/><br \/>\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-161961","topic","type-topic","status-closed","hentry","topic-tag-ansys-mechanical","topic-tag-ansys-workbench","topic-tag-mesh"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":[""],"_bbp_view_count":["236"],"_bbp_likes_count":["0","0"],"_bbp_forum_subforum_count":["0"],"_btv_view_count":["2524"],"_bbp_subscription":["243773"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["161961"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","224373"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["191069"],"_bbp_last_active_id":["191069"],"_bbp_last_active_time":["2021-09-06 16:21:48"]},"test":"hzankerhotmail-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/161961","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\/161961\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=161961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}