{"id":277118,"date":"2023-03-30T07:14:15","date_gmt":"2023-03-30T07:14:15","guid":{"rendered":"\/forum\/forums\/topic\/total-contact-force-and-contact-pressure\/"},"modified":"2023-03-30T07:14:15","modified_gmt":"2023-03-30T07:14:15","slug":"total-contact-force-and-contact-pressure","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/total-contact-force-and-contact-pressure\/","title":{"rendered":"Total Contact Force and Contact Pressure"},"content":{"rendered":"<p>Dear all,<\/p>\n<p>I am currently examine the impact of a ball (steel) with the human hand (I use the hand of the THUMS model). I want to investigate what contact forces and pressures occure when the ball is impacting the human hand. Now I am a little bit confused how to interpret the output of the simulation. The human hand consists of multiple layers: spon bone (solid), cortical bone (shell), tissue (shell), flesh (solid) and skin (shell). All layers have different material properties. I also defined AUTOMATIC_SURFCAE_TO_SURFACE contacts between some of the layers as well as between ball and skin. The goal is to investigate what effect an impact of an object with the back of the human hand has on contact pressure und contact force.&nbsp;<\/p>\n<ol>\n<li>Reading the Ouput RCFORC: do I have to add all forces at a particular time step to get the overall contact force?<img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/03\/30-03-2023-1680160421-mceclip1.png\" width=\"654\" height=\"326\"><\/li>\n<li>Reading the Ouput INTFOR: the same as 1 &#8211; do I have to add the pressures given by FriComp or is it just the maximum of all contact surfaces? I am also not really sure what pressure output I have to take, segment or nodal? is the pressure over the segment calculated as the average of the elements and the nodals is the peak pressure at the particular node?<\/li>\n<li>What is the difference between RCFORC and the &#8220;resultant interface force&#8221; (nodal or segment) in INTFOR?<\/li>\n<li>In order to get the correct results, should I define contact between all layers? Currently contact is defined only between the solids and the shells, but not between two shells<\/li>\n<\/ol>\n<p>At the beginning, I just examined the ball skin contact, but I quickly realized that this is not sufficient. Here is a picture of the simulation (I refined the mesh):<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/03\/30-03-2023-1680159742-mceclip0.png\"><\/p>\n<p>Thanks in advance<\/p>\n","protected":false},"template":"","class_list":["post-277118","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["269999","181804"],"_bbp_author_ip":["23.192.164.14"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["2923"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["277118"],"_bbp_forum_id":["27814"],"_bbp_engagement":["181804","269999"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["277883"],"_bbp_last_active_id":["277883"],"_bbp_last_active_time":["2023-04-04 20:44:29"]},"test":"luisa-hornungh-ka-de"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/277118","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\/277118\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=277118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}