{"id":309359,"date":"2023-09-29T05:38:56","date_gmt":"2023-09-29T05:38:56","guid":{"rendered":"\/forum\/forums\/topic\/problem-in-validating-interference-fit-contact-pressure-with-analytical-values\/"},"modified":"2023-09-29T05:38:56","modified_gmt":"2023-09-29T05:38:56","slug":"problem-in-validating-interference-fit-contact-pressure-with-analytical-values","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/problem-in-validating-interference-fit-contact-pressure-with-analytical-values\/","title":{"rendered":"Problem in validating interference fit contact pressure with analytical values."},"content":{"rendered":"<p>Hello,<\/p>\n<p>I had performed interference analysis of a simple shaft and hub geometry. Analytical calculations were performed as per mentioned formula. 50% deviation in values of Contact pressure obtained from Analytical calculations &amp; ANSYS Mechanical was observed. I don&#8217;t understand what is the problem due to which I am facing this issue.<\/p>\n<p>I am attaching images of formula used, geometry, ANSYS model information below for reference.<\/p>\n<ol>\n<li>Analytical calculations were performed as per following formula:\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/29-09-2023-1695963704-mceclip2.png\"><br \/><strong>Input parameters:<\/strong><br \/>Interference value (&delta;) = 0.137mm<br \/>d = 151mm, d0 = 159mm, di = 133mm, E0 = 72985MPa (Al alloy), Ei = 200000MPa (structural steel), v0 = 0.3, vi = 0.29<\/p>\n<\/li>\n<li><strong>Geometry:<\/strong>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/29-09-2023-1695963549-mceclip0.png\" width=\"594\" height=\"241\"><\/p>\n<\/li>\n<li><strong>Contact information:<\/strong>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/29-09-2023-1695963629-mceclip1.png\"><\/p>\n<p><strong>Contact initial information:<\/strong><\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/29-09-2023-1695964376-mceclip4.png\"><\/li>\n<li><strong>Contact pressure contour:<\/strong>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/09\/29-09-2023-1695963797-mceclip3.png\"><\/p>\n<p>From analytical calculations, contact pressure value obtained for radial interference of 0.137mm was 5.9105MPa. Whereas, in FEA I got contact pressure of 12.3242MPa. I had carried out multiple iterations by changing interference values, but it showed similar deviation between results obtained from both methods.<\/p>\n<p>Thanks in advance.<\/li>\n<\/ol>\n","protected":false},"template":"","class_list":["post-309359","topic","type-topic","status-closed","hentry","topic-tag-mechanical"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["13921","58821"],"_bbp_author_ip":["23.206.193.154"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_bbp_likes_count":["0"],"_btv_view_count":["341"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["309359"],"_bbp_forum_id":["27791"],"_bbp_engagement":["13921","58821"],"_bbp_voice_count":["2"],"_bbp_reply_count":["2"],"_bbp_last_reply_id":["309398"],"_bbp_last_active_id":["309398"],"_bbp_last_active_time":["2023-09-29 11:29:38"]},"test":"kssabhinavarizel-com"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/309359","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\/309359\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=309359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}