{"id":318026,"date":"2023-11-16T14:33:40","date_gmt":"2023-11-16T14:33:40","guid":{"rendered":"\/forum\/forums\/topic\/fatigue-analysis-of-bolts-2\/"},"modified":"2023-11-16T15:58:42","modified_gmt":"2023-11-16T15:58:42","slug":"fatigue-analysis-of-bolts-2","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/fatigue-analysis-of-bolts-2\/","title":{"rendered":"Fatigue Analysis of bolts"},"content":{"rendered":"<pre id=\"tw-target-text\" class=\"tw-data-text tw-text-large tw-ta\" dir=\"ltr\" data-placeholder=\"Traduzione\" data-ved=\"2ahUKEwiol7HG2MiCAxUC1QIHHfmGA1AQ3ewLegQIARAQ\"><span class=\"Y2IQFc\" lang=\"en\">hi, I really need help understanding how to implement a fatigue simulation of threaded connections. i have correctly defined the material of the screws (S-N curves). <br>The point is that performing a fatigue analysis on a two-step analysis, in which in the first step I have the bolt pretension and in the second the application of the loads, makes me doubt whether the software considers that the preload is also applied cyclically. <br>So I eliminated the bolt pretensions and only considered the loads, but I'm not sure it's right not to consider the preload of the screws. How can I consider the static load of the screws and the cyclic loads at the same time? thank you.<br><br><img loading=\"lazy\" decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700145070-fatica4.png\" alt=\"\" width=\"1378\" height=\"742\"> <br><br><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700145171-fatica5.png\" alt=\"\"><br><\/span><\/pre>\n<p>&nbsp;<\/p>\n<p><img decoding=\"async\" src=\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/11\/16-11-2023-1700145201-fatica6.png\" alt=\"\"><\/p>\n","protected":false},"template":"","class_list":["post-318026","topic","type-topic","status-closed","hentry","topic-tag-bolt","topic-tag-fatigue","topic-tag-Screw-1"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_subscription":["32693","58821"],"_bbp_author_ip":["96.7.218.215"]," _bbp_last_reply_id":["0"]," _bbp_likes_count":["0"],"_btv_view_count":["332"],"_bbp_status":["publish"],"_bbp_topic_status":["unanswered"],"_bbp_topic_id":["318026"],"_bbp_forum_id":["27791"],"_bbp_engagement":["32693","58821"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["318036"],"_bbp_last_active_id":["318036"],"_bbp_last_active_time":["2023-11-16 15:58:30"]},"test":"federico-parisini2studio-unibo-it"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/318026","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\/318026\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=318026"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}