PSI - Issue 51

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P.A.R. Ferreira et al. / Procedia Structural Integrity 51 (2023) 115–121 P.A.R. Ferreira et al. / Structural Integrity Procedia 00 (2022) 000–000

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Fig. 4. Shear (τ xy ) and peel (  y ) stress distributions at mid-thickness of the adhesive layer. Comparison between overlap lengths ( L O ) for the curvature radius of 1000 mm.

From the cases described above, the L O =10 mm was chosen as representative because it shows a better stress distribution in the bond line. Then, the effect that R has on the stress distributions was evaluated, here only the L O =10 mm is reported. The increase in R also increases the magnitude of the stress peaks; nevertheless, it also improves the load transfer along the bond line, mostly on τ xy , as shown in Fig. 5. Although this effect contradicts what was observed in previous research (Correia et al., 2020; Liu et al., 2018; Taib et al., 2006), the load imposed here is different to the reported in those studies, adding novelty and being more representative of the working conditions of such joints. Furthermore, the increase in the stress peaks could be caused by the cleavage induced by the internal pressure.

Fig. 5. Stress distributions for the L O =10 mm case with the three evaluated values of R .