Behaviour of Composite-to-Composite Interface for Adhesively Bonded Joints. Experimental Set-Up

摘要

This paper presents the set-up needed for an experimental study regarding the behaviour of adhesively bonded joints manufactured from glass fibre reinforced polymer (GFRP) composites and structural epoxy adhesives. Two types of single lap shear pull-off specimens were designed and assembled for the experimental study. Twelve series of adhesively bonded joints have been conceived for the experimental program. Each series consists in combinations between GFRP composite structural flat profiles bonded with two types of adhesives which are applied in three thicknesses (1 mm, 2 mm and 3 mm). For each combination between the type and the thickness of adhesives, three overlap lengths have been applied (5 cm, 7 cm and 10 cm). By performing this experimental program, several important aspects related to the behaviour of adhesively bonded composite elements such as: characterization of the bond-slip behaviour, characterization of the failure modes, identification of the ultimate loads and evaluation the effective bond lengths are analysed.