Лако-красочные материалы — производство

The importance of the adhesive contribution was more clear by the experimental investigation carried out on different adhesive systems. The mean adhesion strength values of the hybrid and clearance joints bonded with different adhesives were extrapolated and the related data are reported in figure 11 (Gallio et al., 2013). From figure 11 it was possible […]

In order to understand the importance of the adhesive contribution the total resistances of the hybrid joints bonded with the FT-EP at different interference levels were compared to the interference contributions detected from the loads after break of the same samples (figure 10). In addition the resistances of adhesive joints in clearance condition are also […]

A tension-tension fatigue test was performed on the hybrid joints bonded with the FT-EP at 35 цт of interference and the FT-EP bonded samples with clearance, in order to investigate the influence of the interference on the fatigue behavior of the joints. The same load amplitude was employed both for the hybrid samples and the […]

The presence of the interference could also affect the stiffness of the hybrid system. The first elastic stretch of the curves of the hybrid joints were compared with the ones of the systems bonded with clearance, considering all the different adhesives tested. The results are reported in figure 8 (Gallio et al., 2013). Figure 8. […]

Unbonded interference-fit samples were prepared by using the press-fitted hub/shaft joints and tested in static axial pull-out in order to understand the strength contribution of the interference-fit alone (Gallio et al., 2014). Assuming the same friction coefficient between steel and steel for all the samples, a linear relationship between the interference and the pull-out force […]

In order to test the behavior of different adhesive systems in the hybrid joint and to analyze the influence of the interference contribution, hub/shaft laboratory samples were created. The hollow tubes and the shafts were designed according to the requirements imposed by our traction and fatigue test machines. The laboratory samples were machined in C40 […]

Giorgio Gallio * Mariangela Lombardi, Paolo Fino and Laura Montanaro Politecnico di Torino, Department of Applied Science and Technology, Torino, Italy Abstract Nowadays, adhesive bonding is increasingly exploited in industrial applications, especially in multi-material lightweight structures, for its ability to join dissimilar materials together. In order to overcome the limits related to the durability of […]

The assembly technique does influence the final strength of the joint, since especially cryogenic fitting determines an appreciable decay of the adhesive shear strength, even if the components are assembled with interference. The negative effect of heating at +180°C is less severe. Moreover, the shear strength of cylindrical joints reinforced with strong anaerobic adhesive increases […]

The results are collected in the following tables: Table 6 refers to press-fit couplings assembled at R. T. without adhesive, while Table 7 refers to press fit couplings assembled at R. T. and reinforced with adhesive. Table 8 refers to shrink fit couplings with adhesive and hubs heated at +180°C and Table 9 refers to […]

Pin-Collar Specimens The results are collected in the following tables: Table 3 refers to slip fit couplings assembled at R. T.; Table 4 refers to slip fit couplings with collars heated at +180°C; and Table 5 refers to slip fit couplings with pins cooled at — 20°C. Referring to Table 3, the mean adhesive shear […]