{"id":31365,"date":"2018-11-07T12:54:49","date_gmt":"2018-11-07T12:54:49","guid":{"rendered":"\/forum\/forums\/topic\/pressure-distribution-in-the-contact-zone-of-a-spherical-joint-ball-joint-of-a-hip-implant\/"},"modified":"2018-11-07T12:54:49","modified_gmt":"2018-11-07T12:54:49","slug":"pressure-distribution-in-the-contact-zone-of-a-spherical-joint-ball-joint-of-a-hip-implant","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/pressure-distribution-in-the-contact-zone-of-a-spherical-joint-ball-joint-of-a-hip-implant\/","title":{"rendered":"pressure distribution in the contact zone of a spherical joint\/ ball joint of a hip implant"},"content":{"rendered":"<p>Hello,<\/p>\n<p><\/p>\n<p>I am currently struggeling with a static mechanical analysis with ANSYS WORKBENCH 17.2. I am using a ball joint as a part of a hip implant. In the picture you can see the socket of the joint with an area that is marked red.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/0d2cd9b0-e088-4a0e-858a-a99100c29774\/8cc3c616-6616-4a73-8aaf-a99100d1c64c_error-support.jpg?width=690&amp;upscale=false\" alt=\"contact zone at the inner edge of the socket\"><\/p>\n<p><\/p>\n<p>This area has the highest local pressure. I assume that the socket transfers its force to the ball through the edge instead of the transfering it through the areal contact. How do I avoid the local pressure maximum being in the edge of the socket?<\/p>\n<p><\/p>\n<p>Is use four parts: a femoral bone, the shaft of a hip implant and a ball + socket for the ball joint.<\/p>\n<p><\/p>\n<p>The bone is fiexed at specific points. The shaft of the implant is connected to the bone and the ball. The contact between the ball and the socket has a friction coefficient of 0.11. The outer plane of the socket has a force and an external displacement with degrees of freedom set to &#8220;0&#8221; for rotation and &#8220;free&#8221; for translation, sothat the socket won&#8217;t drift of the ball. the ball and the inner area of the socket have the same radius.<\/p>\n<p><\/p>\n<p>&nbsp;<\/p>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/us.v-cdn.net\/6032193\/uploads\/attachments\/0d2cd9b0-e088-4a0e-858a-a99100c29774\/c777e941-fefc-46f6-8f38-a99100d3cfb5_randbedingungen.jpg?width=690&amp;upscale=false\" alt=\"boundary conditions\"><\/p>\n<p><\/p>\n<p>I appreciate every help I can get here.<\/p>\n","protected":false},"template":"","class_list":["post-31365","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["3537"],"_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","0","0","0","0"],"_btv_view_count":["1274"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["31365"],"_bbp_forum_id":["27791"],"_bbp_engagement":["897","160194"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["69402"],"_bbp_last_active_id":["69402"],"_bbp_last_active_time":["2018-11-15 14:56:57"]},"test":"arthurkraus"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/31365","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\/31365\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=31365"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}