![](\"\/forum\/wp-content\/uploads\/sites\/2\/2023\/07\/09-07-2023-1688936826-mceclip0.png\")
<\/a> <\/span><\/p>\nGiving 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: 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":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t<\/a><\/span><\/p>\n