Shear Stress Distribution in Double-lap Adhesive Joints Reinforced with Nylon Fabric: Numerical Investigation

Document Type : Original Article


Dipartimento di Ingegneria Civile, Edile e Architettura (DICEA), Università Politecnica delle Marche, via B. Bianche, Ancona, Italy


Nowadays there are an increasing number of industrial fields in which adhesive technology finds application. The main reason for their growing interest in both science and production is due to the high structural efficiency of this type of joining. Numerous studies have investigated the stress distribution in the adhesive layer under unreinforced conditions. The present work analyzes the elastic shear stress distribution in double-lap adhesive joints between timber and float glass adherends, both in the classical configuration and with an introduction of a nylon reinforcement in the two-component (2K) structural epoxy adhesives layers. In particular, three geometric configurations were investigated: nylon placed on the inner adherend, outer adherend and both. The result showed how the presence of the nylon inclusion changes the stress distribution in the joint. Numerical modelling of the joints was carried out using FE ANSYS©19 software. The greatest reduction in peak adhesive stresses is achieved by placing the reinforcement at both interfaces of the adherends with the adhesives. In general, it can be observed that the insertion of the reinforcement layer leads to a reduction in peak shear stresses, resulting in a potential increase in the ultimate strength of the joint.


Main Subjects

  1. Adams, R.D., Adams, R.D., Comyn, J., Wake, W.C. and Wake, W., "Structural adhesive joints in engineering, Springer Science & Business Media, (1997).
  2. Da Silva, L.F., Adams, R. and Gibbs, M., "Manufacture of adhesive joints and bulk specimens with high-temperature adhesives", International Journal of Adhesion and Adhesives, Vol. 24, No. 1, (2004), 69-83.
  3. Yousefsani, S.A., Tahani, M. and Selahi, E., "Analytical solution of stress field in adhesively bonded composite single-lap joints under mechanical loadings", International Journal of Engineering, Transactions C: Aspects, Vol. 27, No. 3, (2014), 475-486.
  4. Quini, J.G. and Marinucci, G., "Polyurethane structural adhesives applied in automotive composite joints", Materials Research, Vol. 15, (2012), 434-439.
  5. Parate, B.A., "Propellant actuated device for parachute deployment during seat ejection for an aircraft application", HighTech and Innovation Journal, Vol. 1, No. 3, (2020), 112-120.
  6. Hadjez, F. and Necib, B., "Experimental characterization and numerical modelling analyses of nano-adhesive-bonded joints", Frattura ed Integrità Strutturale, Vol. 12, No. 44, (2018), 94-105.
  7. da Silva, L.F.M., Öchsner, A. and Adams, R.D., "Handbook of adhesion technology, Springer, Vol. 1,  (2011).
  8. Mays, G.C. and Hutchinson, A.R., "Adhesives in civil engineering, Cambridge University Press Cambridge, UK:, Vol. 32,  (1992).
  9. Lees, W., "Adhesives in engineering design, Springer, (1984).
  10. Ciupack, Y., Pasternak, H., Mette, C., Stammen, E. and Dilger, K., "Adhesive bonding in steel construction-challenge and innovation", Procedia Engineering, Vol. 172, (2017), 186-193.
  11. Stazi, F., Giampaoli, M., Rossi, M. and Munafò, P., "Environmental ageing on gfrp pultruded joints: Comparison between different adhesives", Composite Structures, Vol. 133, (2015), 404-414.
  12. Tannert, T., Vallée, T. and Hehl, S., "Probabilistic strength prediction of adhesively bonded timber joints", Wood science and technology, Vol. 46, No. 1, (2012), 503-513.
  13. da Silva, L.F., das Neves, P.J., Adams, R. and Spelt, J., "Analytical models of adhesively bonded joints—part i: Literature survey", International Journal of Adhesion and Adhesives, Vol. 29, No. 3, (2009), 319-330.
  14. Adams, R. and Peppiatt, N., "Stress analysis of adhesive-bonded lap joints", Journal of Strain Analysis, Vol. 9, No. 3, (1974), 185-196.
  15. Marchione, F., "Effect of hollow adherends on stress peak reduction in single-lap adhesive joints: Fe and analytical analysis", The Journal of Adhesion, Vol. 98, No. 6, (2022), 656-676.
  16. Owens, J.F. and Lee-Sullivan, P., "Stiffness behaviour due to fracture in adhesively bonded composite-to-aluminum joints i. Theoretical model", International Journal of Adhesion and Adhesives, Vol. 20, No. 1, (2000), 39-45.
  17. Demir, K., Bayramoglu, S. and Akpinar, S., "The fracture load analysis of different support patches in adhesively bonded single-lap joints", Theoretical and Applied Fracture Mechanics, Vol. 108, (2020), 102653.
  18. Marchione, F., "Stress distribution in double-lap adhesive joints: Effect of adherend reinforcement layer", International Journal of Adhesion and Adhesives, Vol. 105, (2021), 102780.
  19. Gaudenzi, P., Nardi, D., Chiappetta, I., Atek, S., Lampani, L., Pasquali, M., Sarasini, F., Tirilló, J. and Valente, T., "Sparse sensing detection of impact-induced delaminations in composite laminates", Composite Structures, Vol. 133, (2015), 1209-1219.
  20. Hu, Z., Kong, H., Tao, L., Qiao, M., Yu, D., Lu, F., Dawelbeit, A. and Yu, M., "Effect of nonwoven carbon tissue-reinforced epoxy resin adhesive layer on the single lap bonding strength of aluminum alloy joints", ACS omega, Vol. 6, No. 37, (2021), 23802-23813.
  21. Wang, B., Hu, X., Hui, J., Lu, P. and Jiang, B., "Cnt-reinforced adhesive joint between grit-blasted steel substrates fabricated by simple resin pre-coating method", The Journal of Adhesion, Vol. 94, No. 7, (2018), 529-540.
  22. Kilik, R. and Davies, R., "Mechanical properties of adhesive filled with metal powders", International Journal of Adhesion and Adhesives, Vol. 9, No. 4, (1989), 224-228.
  23. Marchione, F., "Investigation of vibration modes of double-lap adhesive joints: Effect of slot", International Journal of Engineering, Transactions A Basics, Vol. 33, No. 10, (2020), 1917-1923.
  24. Marchione, F., "Analytical investigation on the stress distribution in structural elements reinforced with laminates subjected to axial loads", International Journal of Engineering, Transactions A: Basics, Vol. 35, No. 4, (2022), 692-697.
  25. Marchione, F., "Analytical stress analysis in single-lap adhesive joints under buckling", International Journal of Engineering, Transactions B: Applications,, Vol. 34, No. 2, (2021), 313-318.
  26. Marchione, F., "Enhancement of stiffness in gfrp beams by glass reinforcement", International Journal of Engineering, Transactions C: Aspects, Vol. 34, No. 3, (2021), 615-620.
  27. Marchione, F. and Munafò, P., "Experimental investigation on timber-glass double-lap adhesive joints reinforced with nylon fabric", Construction and Building Materials, Vol. 275, (2021), 122152.