3406 KB24 KB199920252014Aghdam, Nima JafarzadehEttefagh, Mir MohammadHassanifard, SoranNanvayesavojblaghi, Arvinštevilka:11letnik:60str. 735-741, SI 138ISSN:0039-2480COBISSID:13773083URN:URN:NBN:SI:doc-L2KT6WEZenZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikeksperimentalne modalne analizeexperimental modal analysisfatigue damagefinite element modellingfrekvenčni odzivfrequency responsefriction spot weldingmodeliranje s končnimi elementitočkovno torno varjenjeutrujenostne poškodbevibracijske lastnostivibration characteristicsInvestigating fatigue life effects on the vibration properties in friction stir spot welding using experimental and finite element modal analysis|Frequency response and vibration study of friction-welded specimens with different fatigue life properties is very important. Friction stir spot welding (FSSW) is one of the welding methods applied in different types of manufacturing processes such as in the vehicle and aerospace industries. Therefore the main purpose of this paper is better understanding of the correlation between natural frequencies and fatigue crack initiation of the FSSW in four different welding processes. For this purpose fatigue and experiment modal analysis tests were carried out at different fatigue strength levels. The experimental modal analysis was carried out on four different types of friction stir spot welded specimens after different fatigue life tests. Finite element (FE) modelling was performed in ABAQUS software using the Lanczos method for comparing the obtained results with the experimental tests. Some important findings were determined from the experimental and FE modelling results. One of the interesting findings was similar behaviour between the FE model and the experimental test for defined frequency rangesTočkovno torno varjenje z gnetenjem (FSSW) je vsestranski in sodoben varilski postopek, ki se uporablja v različnih proizvodnih procesih, npr. v avtomobilski, letalski in vesoljski industriji. Glavni namen tega članka je pridobiti boljše razumevanje korelacije med lastnimi frekvencami in iniciacijo utrujenostnih razpok pri zvarih FSSW, narejenih s štirimi različnimi nabori parametrov varilskega procesa. Raziskava je bila opravljena z namenom zbiranja podatkov o enem najobetavnejših postopkov varjenja - FSSWTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo