{"id":159655,"date":"2021-06-20T14:43:47","date_gmt":"2021-06-20T14:43:47","guid":{"rendered":"\/forum\/forums\/topic\/element-shape-checking-with-pre-integrated-shell-section\/"},"modified":"2021-06-29T14:27:29","modified_gmt":"2021-06-29T14:27:29","slug":"element-shape-checking-with-pre-integrated-shell-section","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/element-shape-checking-with-pre-integrated-shell-section\/","title":{"rendered":"Element shape checking with Pre-integrated shell section"},"content":{"rendered":"<div class=\"Item-Body\">\n<div class=\"Message userContent\">\n<p>Hi,<\/p>\n<p>Recently i have been experiencing a strange problem with Mechanical APDL, regarding to radius\/thickness ratio with pre-integrated sections;<\/p>\n<ul>\n<li>I provide several pre-integrated user defined shell section via SSPA,SSPB,SSPD,SSPM commands and assign those to individual surfaces using selection,<\/li>\n<li>Yet, solver does a thickness\/radius check before solution and raises errors and aborts solution<\/li>\n<li>Element Shape checking was turned off via SHPP,OFF command, yet solver keeps checking element shape and raising errors then aborting solution<\/li>\n<li>As the last option, i have used the exact section properties which MAPDL gives as output of the SLIST,FULL command (for a section which solution processes and produces results without any shape errors). Solution is aborted with GENS, while it process with casual section definition command which sets a thickness value.<\/li>\n<\/ul>\n<p>A few questions;<\/p>\n<p>How does Mechanical APDL conduct element shape check routine (thickness\/radius) in case of user-defined shell sections which an actual thickness value is absent (all thichkness value seems as &quot;1&quot; , which is in meters, in error lines) ?<\/p>\n<p>My shell section integration is consistent and fits to the theory and gives accurate results via external solvers but why Ansys Mechanical APDL does not accept it to be valid?<\/p>\n<p>Why Ansys does not pass Element shape checking (except of nodal and property consistency and availability), despite of its being turned off by user?<\/p>\n<p>Further attempts to diagnose, I have also used ESCHK command to view problematic elements yet those were not in abrupt shape, passes casual shape check (jacobian, aspect ratio etc) but fails curvature radius\/thickness criteria (eventhough shape checking is turned off) and solution aborts.<\/p>\n<p>Best Regards.<\/p>\n","protected":false},"template":"","class_list":["post-159655","topic","type-topic","status-closed","hentry"],"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":["1405"],"_bbp_likes_count":["0"],"_bbp_subscription":["253056"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["159655"],"_bbp_forum_id":["27791"],"_bbp_engagement":["178939","185297"],"_bbp_voice_count":["2"],"_bbp_reply_count":["3"],"_bbp_last_reply_id":["182764"],"_bbp_last_active_id":["182764"],"_bbp_last_active_time":["2021-06-29 14:27:29"]},"test":"isoo"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/159655","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\/159655\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=159655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}