20.500.12556/RUL-159265 Influence of geometric imperfections of flange joints on the fatigue load of preloaded bolts In an ideal flange joint configuration, the fatigue endurance of preloaded bolts is contingent upon factors such as the magnitude of preload, applied working load, and the geometric dimensions of the flange. However, real-world flanged joints often deviate from this ideal geometry, introducing imperfections that can markedly escalate the fatigue burden on bolts. This study endeavors to simulate the geometric imperfections inherent in a standard DN40 flange and ascertain their impact on bolt fatigue through a combination of empirical measurements and finite element (FE) analysis. The investigation reveals that even minor deviations in flange geometry, such as non-parallelism on the order of 0.03 mm, can exert a considerable influence on bolt fatigue, particularly when the flange gap aligns with the applied eccentric working load (same side). To mitigate the deleterious effects of these imperfections, the proposal and evaluation of employing filler material between the flanges are made. Specifically, it is demonstrated that a thin layer of liquid metal filler (KemisKit Fe21), substantially alleviates the fatigue burden on bolts. Empirical findings illustrate that this corrective measure enhances the fatigue life of bolts by a factor of more than 30 under the highest applied working load condition. bolted flange joint preload working load bolt fatigue life prying action geometrical flange imperfections prirobnična vijačna zveza delovna obremenitev prednapetje življenjska doba vijaka razpiranje prirobnic geometrijske napake prirobnic true false true Angleški jezik Slovenski jezik Članek v reviji 2024-07-04 13:40:29 2024-07-04 13:40:34 2024-07-14 03:28:31 0000-00-00 00:00:00 2024 0 0 16 str. Vol. 210, art. 105237 Aug. 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 620.178.3:519.61 1879-3541 10.1016/j.ijpvp.2024.105237 200732163 Okorn_..._Influence_of_geometric_imperfections_of_flange_joints_on_the_fatigue_load.....pdf Okorn_..._Influence_of_geometric_imperfections_of_flange_joints_on_the_fatigue_load.....pdf 1 16722D0F703E9B11D5A27827B236CBCF 6ef101e49c267947f3d861a0530f205799f3d91a2e9d85fb2019e0079b0da131 5720b481-39fb-11ef-90ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=187230 https://www.sciencedirect.com/science/article/pii/S0308016124001145 1 37a8bc65-39fa-11ef-90ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=187229 Fakulteta za strojništvo 0 0 0