{"id":292171,"date":"2023-07-09T21:31:39","date_gmt":"2023-07-09T21:31:39","guid":{"rendered":"\/forum\/?post_type=topic&p=292171"},"modified":"2023-07-09T21:48:06","modified_gmt":"2023-07-09T21:48:06","slug":"random-vibration-fatigue-analysis-of-a-bolted-joint","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/random-vibration-fatigue-analysis-of-a-bolted-joint\/","title":{"rendered":"Random Vibration fatigue analysis of a bolted Joint"},"content":{"rendered":"

Hi!<\/p>\n

i’m trying to make an PSD analysis of the structure showed below.<\/a> <\/span><\/p>\n

Giving more details about my model, the boundary condition is that the bigger hole is fixed. In addition, a 3 axis PSD profile is apllied in the cilyndrical surface of this bigger hole as well. The joint of two parts is modeled as 4 fixed joints beetween the 8(4+4) cylindrical surfaces. I managed to run the simulation and retrieve Von Mises stress in the holes surfaces, like I show below:<\/a><\/span><\/p>\n

That would be enough to perform a simplified static structural analysis on the 4 M8 bolts that connect two parts. However, my main goal is to perform a fatigue analysis on the 4 bolts themselves and retrieve the number of cycles to failure. Do you guys know how to perform this kind of analysis? I was planning on using the Fatigue tool of this same Random vibration Modulus, but I’m struggling to model the bolted joint in a way it can reflect well the real behavior of my structure. I read something about moddeling bolts as line bodies and applying a pretension load, but I don’t know if it works in Random vibration Analysis, so if you could help me, I would be grateful. You can assume that the bolt pretension is known and that I also have the 4 M8 bolts CAD model to work on. <\/p>\n

Thanks.<\/p>\n","protected":false},"template":"","class_list":["post-292171","topic","type-topic","status-closed","hentry","topic-tag-bolted-connection-1","topic-tag-fatigue-analysis","topic-tag-psd","topic-tag-random-vibration"],"aioseo_notices":[],"acf":[],"custom_fields":[{"0":{"_bbp_author_ip":["168.143.243.14"],"_bbp_subscription":["245769","3796"],"_btv_view_count":["2165"],"_edit_lock":["1688939239:171241"],"_bbp_topic_status":["unanswered"],"_bbp_status":["publish"],"_bbp_topic_id":["292171"],"_bbp_forum_id":["27791"],"_bbp_engagement":["3796","245769"],"_bbp_voice_count":["2"],"_bbp_reply_count":["1"],"_bbp_last_reply_id":["292300"],"_bbp_last_active_id":["292300"],"_bbp_last_active_time":["2023-07-10 12:54:20"]},"test":"bruno-tavaresime-eb-br"}],"_links":{"self":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/topics\/292171","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\/292171\/revisions"}],"wp:attachment":[{"href":"https:\/\/innovationspace.ansys.com\/forum\/wp-json\/wp\/v2\/media?parent=292171"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}