{"id":39460,"date":"2019-12-07T23:26:15","date_gmt":"2019-12-07T23:26:15","guid":{"rendered":"\/forum\/forums\/topic\/stiffness-of-joints\/"},"modified":"2019-12-07T23:26:15","modified_gmt":"2019-12-07T23:26:15","slug":"stiffness-of-joints","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/stiffness-of-joints\/","title":{"rendered":"Stiffness of Joints"},"content":{"rendered":"<p>Hello<br \/>\nI have a problem in ANSYS workbench when modelling a 3D steel building, aiming to have pinned joints in a direction + bracing, and fixed\/semi rigid joints in the other direction. After identifying all the joints, with torsional stiffness = 0 for the pinned connections, the model didn&#8217;t work and showed me the error of a problem with DoF and that there is under\/ill constraints. I tried to change them to fixed and it worked.  Then I made them revolute again but with different values of stiffness, the bending moment doesn&#8217;t change for this direction whatever value of stiffness I insert. For the other direction it works totally fine. And I tried the pinned connections for a 2D model and it also worked fine. So, I can&#8217;t really find a clue about the reason for the error.<\/p>\n","protected":false},"template":"","class_list":["post-39460","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["11639"],"_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"],"_btv_view_count":["823"],"_bbp_subscription":["245637"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["39460"],"_bbp_forum_id":["27794"],"_bbp_engagement":["171297"],"_bbp_voice_count":["1"],"_bbp_reply_count":["0"],"_bbp_last_reply_id":["0"],"_bbp_last_active_id":["39460"],"_bbp_last_active_time":["2019-12-07 23:26:15"]},"test":"fadyeldalil95"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/39460","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\/39460\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=39460"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}