Abstract
In recent years, bonding joints are the most effective way to successfully and safely combine different materials in sectors such as automotive, aircraft and aerospace industries. In particular, the combination of composite materials, such as rivets, welds, non-conformity of traditional methods have been made use of bonding joints. The fracture behavior of the adhesive is important in adhesively bonded. In the present study, the fracture behavior of the adhesive was investigated experimentally under Mode-I loading of Double Cantilever Beam (DCB) joints obtained by using materials of different width and thickness. AA2024-T3 aluminum is used as the adherend and two component Araldite 2015 tough adhesive is used as adhesive. The fracture progression during the experiment was measured with a high-speed camera and the displacement was measured by a video extensometer. As a result; when the fracture energies of the experimentally obtained adhesive are examined, the fracture energy of the joint changes when the width and thickness of the adherend changes. In addition, the fracture energies of the joint obtained with the Corrected Beam Theory (CBT) and the Standard Test Method (SBT) are compared, and the fracture energy obtained with CBT is more accurate considering the elastic rotation in the adherend.
Highlights
In recent years, bonding joints are the most effective way to successfully and safely combine different materials in sectors such as automotive, aircraft and aerospace industries
The fracture behavior of the adhesive was investigated experimentally under Mode-I loading of Double Cantilever Beam (DCB) joints obtained by using materials of different width and thickness
GIC values of DCB joints were obtained according to two different standards such as Corrected Beam Theory (CBT) and Standard Test Method (SBT) and these two standards were compared
Summary
In recent years, bonding joints are the most effective way to successfully and safely combine different materials in sectors such as automotive, aircraft and aerospace industries. An approach that has been widely used in the nonlinear finite element analysis of adhesively bonded joints until the last few years; considering the stress-strain behavior obtained from the tensile test of bulk samples, the elastic - plastic stress and deformation values of the materials are used. The use of Cohezive Zone Model is increasing day by day in numerical analysis of adhesive bonded joints. The fracture behavior of the adhesive was investigated experimentally under Mode-I loading of Double Cantilever Beam (DCB) joints obtained by using materials of different width and thickness. GIC (critical pull energy) values of DCB joints were obtained according to two different standards such as Corrected Beam Theory (CBT) and Standard Test Method (SBT) and these two standards were compared
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