Abstract

From the survey of worksabout the study of viscoelastic adhesively bonded tubular joint, it was found that a little amount of data is available about the effects of viscoelastic properties of adhesive material on the overall performance of adhesively bonded joints. In the current investigation, stress analysis was carried out for six different geometries of adhesively bonded tubular joints under quasi-static internal pressure, taking into consideration the viscoelastic properties of the adhesive material. Lifetime investigation was carried out for the adopted joints under open and closed end conditions, based on the experimental data of the mechanical properties for the viscoelastic adhesive. Finite element method was adopted through the current investigation considering non-linear viscoelastic behavior of the adhesive. The effects of joint geometry and loading conditions on the lifetime and the equivalent stresses were investigated. From the obtained results it was found that double scarf with external sleeve and stepped adhesively bonded joints are the most appropriate joints under open end condition. In addition for closed end condition butt jointwith external sleeve and external recessed sleeve joint are the most appropriate joints.

Key words: Viscoelasticity; Lifetime; FEM; Adhesively bonded tubular joint; Generalized Maxwell model