{"id":292165,"date":"2023-07-09T16:15:28","date_gmt":"2023-07-09T16:15:28","guid":{"rendered":"\/forum\/forums\/topic\/friction-forumulation-in-ansys-exponential-friction-decay\/"},"modified":"2023-07-09T16:15:28","modified_gmt":"2023-07-09T16:15:28","slug":"friction-forumulation-in-ansys-exponential-friction-decay","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/friction-forumulation-in-ansys-exponential-friction-decay\/","title":{"rendered":"friction forumulation in ansys: Exponential friction decay"},"content":{"rendered":"<p>Hi,<\/p>\n<p>Based on ansys contact technology guide (section 3.9.5), I understand that the friction formulation in ansys is based on Columb friction. In transient analysis, only one coefficient of friction can be defined (unlike explicit dynamics). So, I created a transient analysis linked to explicit dynamics workbench as shown below. allowing me to input the friction coefficient for dynamic and static, decay coefficient.&nbsp;<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/09-07-2023-1688918795-mceclip0.png\" width=\"317\" height=\"429\"> <img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/09-07-2023-1688918855-mceclip1.png\" width=\"255\" height=\"94\"><\/p>\n<p>As I wanted to simply test this friction formulation, i tried to simulate a block sliding example. However, I got the following graph for friction stress vs relative velocity.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/09-07-2023-1688918997-mceclip2.png\" width=\"399\" height=\"240\"><\/p>\n<p>I am unable to see the friction decay, as I was expecting to see based on Figure 3.12 in contact technology guide.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/09-07-2023-1688919126-mceclip3.png\" width=\"334\" height=\"224\"><\/p>\n<p>If anyone has any insight regarding this, it would be really helpful. Kindly advise what could be the error here.<\/p>\n<p>Thanks.<\/p>\n","protected":false},"template":"","class_list":["post-292165","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["21014","13386"],"_bbp_author_ip":["23.217.200.46"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["1373"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["292165"],"_bbp_forum_id":["27791"],"_bbp_engagement":["13386","21014"],"_bbp_voice_count":["2"],"_bbp_reply_count":["4"],"_bbp_last_reply_id":["292913"],"_bbp_last_active_id":["292913"],"_bbp_last_active_time":["2023-07-13 10:19:30"]},"test":"pranshu-kharbandantu-edu-sg"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/292165","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\/292165\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=292165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}