PSI - Issue 47

J.E.S.M. Silva et al. / Procedia Structural Integrity 47 (2023) 70–79 Silva et al. / Structural Integrity Procedia 00 (2019) 000 – 000

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and moderate ductility of this adhesive enable an improved distribution of stresses along the bond length, by reducing peak stresses at the bond ends, which consequently increases the TSJ strength at a higher rate with the  reduction, especially for lower  (Campilho et al. 2013). The TSJ bonded with the 7752 present the lowest P m values, up to three times lower than those obtained for the AV138, considering  =45°. On the other hand, this is the adhesive with the highest percentile increase in P m between  =45º and 10°. The high flexibility and ductility of this adhesive, combined with the increase in the bond length resulting from reducing from  =45° to 10°, made possible a percentile increase in P m of 450.57%, with P m =9.71 kN for  =10º, a value that remains much below the other adhesives, by 39.65% (AV138) and 131.64% (2015).

a)

b)

c)

Fig. 9. Graphic representation of SDEG in the TSJ with  =45° for with the adhesives: (a) AV138, (b) 2015 and (c) 7752.

Fig. 10. Plot of P m as a function of  for the three adhesives.

5. Conclusions This work reported the adhesive type effect on the strength of adhesively-bonded TSJ. Axisymmetric CZM modelling validation was accomplished with TLJ experiments. This process was successfully accomplished with a maximum P m offset of 6.1% to the experimental tests, considering the two Araldite ® adhesives. Higher differences were found for the 7752, which was justified. The numerical analysis on TSJ that followed enabled a clear perception of the adhesive type effect on  y and  xy stresses, and P m . The reported stress analysis showed that  y stresses are mostly smaller than  xy stress, except for the higher  . Nonetheless,  y stresses peak at the adhesive edges, with