Issue 44

F. Hadjez et alii, Frattura ed Integrità Strutturale, 44 (2018) 94-105; DOI: 10.3221/IGF-ESIS.44.08 99 Unfilled Epoxy Nanofilled Epoxy F max Error 7456.8 0.24% 8983.9 0.05% δ Fmax (mm) Error 0.345 3% 0.439 2.62% τ max,av (MPa) Error 11.12 0.63% 13.09 0.18% E max ( mJ) Error 1699.7 16.03% 2245.3 13.19% Table 3 : Main results of the simulations, and the errors with respect to the experimental results. Figure 6 : Force–displacement curves for the samples formed using unfilled and nanofilled adhesive. D ISCUSSION he adhesive stresses obtained using the software model based on finite element analysis are now compared with the experimental results. The stress distributions were modelled for a single adhesive lap joint, as shown in Fig. 9a and 9b. The force–displacement curves shown in Fig. 10a and 10b indicate that the failure loads of the joints increased because the displacement capacity of the nanostructure joint type increased. The increase in joints containing nanostructures supports our conclusion from the experimental results that adding nanostructures increases the average failure load. Figure 7 : Finite element model. T