![]() Springer International Publishing, Chamįricke W. Hobbacher AF (2016) Recommendations for fatigue design of welded joints and components, 2nd edn. For the fatigue data with different plate thickness ( \(t_\)), no significant difference is found in the notch S–N diagram. FAT200 ( \(m = 3\)) line is recommended by this paper for higher reliability. The results reveal that the FAT225 ( \(m = 3\)) notch S–N curve recommended by IIW is slightly non-conservative for butt-welded joints. As an application of these parametric formulae, fatigue test data of butt-welded joints has been collected and re-analyzed with the effective notch stress approach. Corresponding parametric formulae are proposed with considerable parameters taken into account, which have been proved to be accurate. The effect of angular and axial misalignments on the SCF and clamping-induced stress are investigated in wide application ranges. Moreover, under the action of in-plane bending (IPB) and out-of-plane bending (OPB) moments, SCF reductions of about 45% and 50% were observed, respectively.Parametric study for the stress concentration factor (SCF) and clamping-induced stress of butt-welded joints under fatigue test condition has been carried out with the finite element method. Results of the analyses for a 6 mm CFRP layup show that under axial loading (AX), the FRP strengthening decreases SCFs up to 30% and 50% at Crown and Saddle points on the chord, respectively. ![]() Results derived from analyses are promising and show that the FRP strengthening method could be considered as an effective method to reduce the SCFs and consequently extend the fatigue life cycle of tubular T-joints. Six different types of FRP materials such as Glass/Vinyl ester, Glass/Epoxy (Scotch ply 1002), S-Glass/Epoxy, Aramid/Epoxy (Kevlar 49/Epoxy), Carbon/Epoxy (T300-5208) and Carbon/Epoxy (AS/3501) were used as strengthening material in order to investigate the SCF values on the chord member of the tubular T-joints. The benchmark joints were validated against the Lloyd's Register and API equations together with the experimental results. The numerical analyses were performed using ABAQUS Finite Element software package. The stress concentration factors (SCF) in FRP strengthened tubular T-joints subjected to brace axial loading, in-plane and out-of-plane bending moments were investigated. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
February 2023
Categories |