{"id":31106,"date":"2018-10-24T23:17:00","date_gmt":"2018-10-24T23:17:00","guid":{"rendered":"\/forum\/forums\/topic\/fatigue-testing-inaccurate-life-results\/"},"modified":"2018-10-24T23:17:00","modified_gmt":"2018-10-24T23:17:00","slug":"fatigue-testing-inaccurate-life-results","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fatigue-testing-inaccurate-life-results\/","title":{"rendered":"Fatigue testing &#8211; inaccurate Life results"},"content":{"rendered":"<p>Hi everyone,<\/p>\n<p><\/p>\n<p>I&#8217;m running a fatigue analysis in Static Structural on a number of different orthopedic spine devices. I have four different geometries and am running three tests &#8211; compression, torsion, and compression + shear &#8211; on each.<\/p>\n<p><\/p>\n<p>The issue I&#8217;ve come across is that the Fatigue Life result is the same for every one of the 12 simulations. In each case, the minimum Life result is reported as 1307300 cycles. I don&#8217;t doubt this is a realistic result, but I doubt that&nbsp;every single one of the 12 scenarios made it through the exact same number of cycles.<\/p>\n<p><\/p>\n<p>So my question is, how exactly is Life calculated?&nbsp;Is it based off a particular material property? Our device is made of a unique material for which we have reported fatigue data, so the fact that all constructs have the same fatigue result makes me think that the material has something to do with it.<\/p>\n<p><\/p>\n<p>Please let me know if I can provide any more information. Thank you in advance for your help!<\/p>\n","protected":false},"template":"","class_list":["post-31106","topic","type-topic","status-closed","hentry"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_old_topic_id":["3278"],"_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":["4046"],"_bbp_subscription":["275169"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["31106"],"_bbp_forum_id":["27791"],"_bbp_engagement":["240","158537","275169"],"_bbp_voice_count":["3"],"_bbp_reply_count":["5"],"_bbp_last_reply_id":["249771"],"_bbp_last_active_id":["249771"],"_bbp_last_active_time":["2023-02-14 12:12:23"]},"test":"rmknox"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/31106","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\/31106\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=31106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}