PSI - Issue 47

J.P.M. Lopes et al. / Procedia Structural Integrity 47 (2023) 48–55 Lopes et al. / Structural Integrity Procedia 00 (2019) 000 – 000

55

8

40

30

20

U [J]

10

0

0

10

20

30

40

l [mm] AV138 2015 7752

Fig. 9. U as a function of l .

4. Conclusions The present work numerically studied the adhesive type effect on T -joints in aluminum components, using l as the main geometrical parameter. Despite being a peel-dominant geometry, the T -joint showed to sustain  xy stresses of lower magnitude than  y stresses. Both stress components were highest at the end portion of the T -part, i.e., x / l =0, serving as the potential site for damage initiation, and smaller peak stresses were also found at the T -part radius transition region. Major differences on P m and U were found depending on the adhesive type and l . The ductile polyurethane 7752 showed the best P m and U results for all l , with large improvements with l , due to the ability to plasticize at the stress concentration sites, although having the lowest strength. The strong but brittle AV138 resulted in no sensible P m and U variation with l , due to the peel-dominant applied load. The moderately ductile 2015 led to average results between the other adhesive, with intermediate performance improvement with l . References Adams, R. D. (2005). Adhesive bonding: science, technology and applications, Elsevier. Alfano, G., 2006. On the influence of the shape of the interface law on the application of cohesive-zone models. Composites Science and Technology 66(6), 723-730. Barzegar, M., Moallem, M. D. and Mokhtari, M., 2021. Progressive damage analysis of an adhesively bonded composite T-joint under bending, considering micro-scale effects of fiber volume fraction of adherends. Composite Structures 258, 113374. Belytschko, T. and Black, T., 1999. Elastic crack growth in finite elements with minimal remeshing. International journal for numerical methods in engineering 45(5), 601-620. Campilho, R. D., Banea, M. D., Neto, J. and da Silva, L. F., 2013. Modelling adhesive joints with cohesive zone models: effect of the cohesive law shape of the adhesive layer. International Journal of Adhesion and Adhesives 44, 48-56. Campilho, R. D., Banea, M. D., Pinto, A. M., da Silva, L. F. and De Jesus, A., 2011a. Strength prediction of single-and double-lap joints by standard and extended finite element modelling. International Journal of Adhesion and Adhesives 31(5), 363-372. Campilho, R. D. S. G., Banea, M. D., Chaves, F. J. P. and Silva, L. F. M. d., 2011b. eXtended Finite Element Method for fracture characterization of adhesive joints in pure mode I. Computational Materials Science 50(4), 1543-1549. Campilho, R. D. S. G., Banea, M. D., Neto, J. A. B. P. and da Silva, L. F. M., 2012. Modelling of single-lap joints using cohesive zone models: Effect of the cohesive parameters on the output of the simulations. The Journal of Adhesion 88(4-6), 513-533. Campilho, R. D. S. G., Banea, M. D., Pinto, A. M. G., da Silva, L. F. M. and de Jesus, A. M. P., 2011c. Strength prediction of single- and double lap joints by standard and extended finite element modelling. International Journal of Adhesion and Adhesives 31(5), 363-372. Faneco, T., Campilho, R., Silva, F. and Lopes, R., 2017. Strength and fracture characterization of a novel polyurethane adhesive for the automotive industry. Journal of Testing and Evaluation 45(2), 398-407. Goland, M. and Reissner, E., 1944. The stresses in cemented joints. Hart-Smith, L. J. (1973). Adhesive-bonded single-lap joints. Li, W., Blunt, L. and Stout, K. J., 1997. Analysis and design of adhesive-bonded tee joints. International Journal of Adhesion and Adhesives 17(4), 303-311. Li, W., Pang, B., Han, X., Tang, L., Zhao, K. and Hu, P., 2016. Predicting the strength of adhesively bonded T-joints under cyclic temperature using a cohesive zone model. The Journal of Adhesion 92(11), 892-907. Moreira, R. D. F. and Campilho, R. D. S. G., 2015. Strength improvement of adhesively-bonded scarf repairs in aluminium structures with external reinforcements. Engineering Structures 101, 99-110. Petrie, E. M. (2000). Handbook of adhesives and sealants. New York, USA, McGraw-Hill. Volkersen, O., 1938. Die Nietkraftverteilung in zugbeanspruchten Nietverbindungen mit konstanten Laschenquerschnitten. Luftfahrtfor schung 15, 41-47.