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This paper deals with the complexity of mechanical characterization of adhesives and modelling its behaviour in an assembly. Different testing systems have been studied such as tensile tests on bulk specimens, Arcan-Mines tests in different loading conditions, to characterize the mechanical behaviour and failure criteria of an epoxy base adhesive, under static and fatigue loading by taking into account viscoplastic behaviour of the adhesive. A static failure criterion has been proposed and extended for fatigue loading. Thick Adherent Shear Tests and single lap shear tests have been performed and compared with previous ones. A Finite Element (FE) simulation has been made in order to validate the proposed models. [ABSTRACT FROM AUTHOR]

This study deals with the characterization of two adhesive joints under quasi static and fatigue loading. Different testing systems were involved. For quasi static loading, the complex behaviour model based on modified Drucker-Prager criterion taken into account hydrostatic stress and rate dependence was proposed to describe the elasto-visco-plastic experiments with the aid of finite element simulations (FEM). For fatigue loading, the lifetime of adhesives was studied. S-N curves was established and extended a failure criterion for any number of cycles. Endurance limit was determined for any combination of applied load for one adhesive, while another adhesive showed the endurance limit only in shear loading. [ABSTRACT FROM AUTHOR]