{"id":298458,"date":"2023-08-07T07:27:51","date_gmt":"2023-08-07T07:27:51","guid":{"rendered":"\/forum\/forums\/topic\/rolling-joint-model-check\/"},"modified":"2023-08-09T08:25:17","modified_gmt":"2023-08-09T08:25:17","slug":"rolling-joint-model-check","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/rolling-joint-model-check\/","title":{"rendered":"Rolling joint model check"},"content":{"rendered":"<p>Good morning everyone,<\/p>\n<p>I&#8217;m trying to perform a static simulation to evaluate the stress in the wires that actuate a snake robot made of rolling joints.&nbsp;<\/p>\n<p>At the moment I am focusing on a model which is composed of a base, a link and 4 wires.<\/p>\n<p>Since I am having convergence issues, I&#8217;d like to have some feedback about it.<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/07-08-2023-1691392535-Body.png\" alt=\"\"><\/p>\n<p>The settings of the analysis are the following:<\/p>\n<p>&#8211; Base and link bodies are rigid, while the wires are flexible.<\/p>\n<p>&#8211; Connections:<\/p>\n<ul>\n<li>Frictionless contact between the wires and the link and the wires and the base. Stabilization damping factor of 0,05 and time step control predict for impact;<\/li>\n<li>Frictional contact between the base and the link with friction coefficient of 0.2;<\/li>\n<li>Fixed joints on the right between the edges of the link and the wires;<\/li>\n<li>Ground to base fixed joint to the surface of the base on the left;<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/07-08-2023-1691391986-Connections.png\" alt=\"\"><\/p>\n<p>&nbsp;&#8211; Analysis settings<\/p>\n<ul>\n<li>Two wires are pulled while the other two have a fixed support constraint;<\/li>\n<li>Remote force on the edge of the link;<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/07-08-2023-1691392648-Force.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/08\/07-08-2023-1691392293-Analysis settings.png\" alt=\"\"><\/p>\n<p>&nbsp;<\/p>\n<p>Thanks in advance to anyone that can help me.<\/p>\n","protected":false},"template":"","class_list":["post-298458","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["290654","13386","240"],"_bbp_author_ip":["23.206.193.150"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["780"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["298458"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","13386","290654"],"_bbp_voice_count":["3"],"_bbp_reply_count":["13"],"_bbp_last_reply_id":["309078"],"_bbp_last_active_id":["309078"],"_bbp_last_active_time":["2023-09-27 12:12:59"]},"test":"paolo-langellacern-ch"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/298458","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\/298458\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=298458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}