Modelling the static response of unaged adhesively bonded structures

The fatigue response of environmentally degraded adhesively bonded aluminium structures

“…It follows from work reported elsewhere [24,25] that was undertaken investigating the quasi-static response of the same joints in both unaged and aged conditions. The moisture dependent mechanical properties of the adhesive and cohesive zone properties (later used in the FEM) that were developed in this earlier quasistatic work are summarised in Table 1.…”

“…The properties were taken to degrade linearly between the limiting values given. The experimental and predicted static response of these joints has been presented in [24,25] and a summary of the experimental and predicted static strengths are shown in Table 2. (Table 2) although the damage mechanism will not be the same.…”

“…The FE modelling was performed using ABAQUS standard FE code [25]. Both thermal and swelling strains were included in the model.…”

“…The bilinear traction-separation law of the cohesive zone model (CZM) (see Fig. 10a) has been successfully used to predict progressive damage and residual strength in the unaged and aged MSLJ and LDB [24,25]. This approach has been further extended in this fatigue modelling.…”

“…This approach has been further extended in this fatigue modelling. A detailed study of the effect of the CZM parameters and associated mesh convergence on the response of the MSLJ has been reported elsewhere [25] for the dry joint. For the aged joints, the adhesive and the cohesive zone properties (i.e the normal and shear of traction, stiffness and fracture energy) were reduced due to moisture uptake [26 and Fig 10 b].…”