A viscoelastic–viscoplastic model for adhesives subjected to reversed cyclic load

Abstract This study aims to describe a toughened adhesive’s ratcheting–recovery behavior under reversed cyclic load using viscoelastic–viscoplastic model. As most adhesives are based on synthetic polymers, their tensile and compression response can be different. A series of load–Sunload tests were conducted bulk bonded joints involving tension/compression–shear loads characterize the initial yield surface. The effect hydrostatic stress was studied by considering instantaneous strength loads. Given observed modulus degradation extensive permanent strain during tests, time-dependent damage factors considered for both viscoelastic viscoplastic responses. model implemented in finite element (FE) code used shear with varying frequency. Good agreement between experiment obtained. consideration required adhesive response.