PSI - Issue 77

C.F.F. Gomes et al. / Procedia Structural Integrity 77 (2026) 95–102 Gomes et al. / Structural Integrity Procedia 00 (2026) 000–000

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4 Conclusions This study investigated the mechanical performance of tubular adhesive joints using different combinations of adherends and adhesives. A validated CZM approach was employed to predict P m and U . The main conclusions are as follows: • DIN 55Si7 steel consistently achieved the highest P m , with values up to 64.8 kN for L O =40 mm. This superior performance is attributed to its high stiffness and limited plastic deformation. • The brittle AV138 provided the highest Pm across all adherends and L O , particularly when paired with DIN 55Si7. The ductile 7752 exhibited the lowest Pm but provided the most progressive failure. The moderately ductile 2015 offered a favorable compromise, achieving high U and competitive P m , particularly in aluminum and CFRP joints. • The highest U was recorded in aluminum joints bonded with the 2015, reaching 33.2 J at L O =40 mm, benefiting from adherend plasticization. In CFRP and steel joints, the 2015 adhesive also demonstrated the best U capacity. The AV138, despite its strength, exhibited lower U values due to its brittle nature, while the 7752, although ductile, had a more stable but limited U profile. Overall, the results highlight the importance of selecting adhesive-adherend combinations tailored to application specific requirements, whether prioritizing P m or U . These findings offer guidelines for the design of reliable and efficient tubular adhesive joints in structural applications. References Barbosa, D. R., Campilho, R., Rocha, R. J. B., Ferreira, L. R. F., 2019. Experimental and numerical assessment of tensile loaded tubular adhesive joints. Proceedings Of The Institution Of Mechanical Engineers Part L-Journal Of Materials-Design And Applications 233(3): 452-464. Campilho, R. D., Banea, M. D., Pinto, A. M., da Silva, L. F., De Jesus, A., 2011. 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