Convalida sperimentale di un modello micromeccanico per la resistenza statica di interfacce ibride forzamento-incollaggio

The paper deals with the investigation of the static strength of friction interfaces supplemented with anaerobic adhesives, by performing a systematic experimental campaign on ad-hoc annular specimens. Aim of the work is to assess a micro-mechanical model, previously proposed by Dragoni et al. [Int. J. Adhes. & Adhes., 20 (2000), 315-321], which correlates the static shear strength of hybrid interfaces to the contact force. The experimental campaign, performed on annular butt specimens, involved three variables: adhesive material, contact pressure along the polymerization and contact pressure along the failure test. The torque tests show that the shear strength of all hybrid interfaces increases with contact pressure. In particular, the strong anaerobic adhesive exhibits a strength that approximately equals the sum of friction and adhesive strength, taken separately.