Because bonded structures bear such a high level of responsibility, it is critical to accurately predict fracture behaviour under a variety of stresses. Numerical simulations, similar to Cohesive Zone Models (CZM), can be used for strength prediction. The influence of adhesive thickness (t_A) variation on the value of tensile fracture toughness (G_n^c) of a bonded joint is investigated numerically in this paper. The direct technique was also used to get the cohesive qualities and geometric dimensions that were incorporated as basic properties in the simulation software. The numerical effort entails reproducing the experimental data, namely the load-displacement (P-d) curves, in order to confirm the cohesive laws established for the various tested t_A. For this project, the triangular CZM was chosen, with 2D modelling in plane-strain conditions as the most suited condition for the geometry in issue. CZM guidelines for the Sikaforce® have been provided and proven as a consequence of this study for the design of bonded structures, substantially speeding up the procedure.

Author(s) Details:

R. P. R. O. Antunes,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal.

R. D. S. G. Campilho,
Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 431, 4200-072 Porto, Portugal and INEGI – Pólo FEUP, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.

Please see the link here: https://stm.bookpi.org/TIER-V3/article/view/7072