Viscoelastic failure analysis of composite plates and shells

An analytical–numerical framework for the study of ageing in fibre reinforced polymer composites

“…This phenomenon corresponds to a strongly nonlinear behaviour and can be model as non-linear viscoelasticity or as a combination of viscoelasticity and damage [1,24,25]. In some situations, moisture is seen to relax pre-existent internal stresses thus having a beneficial effect [26].…”

“…The formulation of progressive failure analysis presented in [1] could be rewritten introducing the ageing effect.…”

“…These values have to be determined experimentally. The degradation algorithm has been presented in [1].…”

“…For the case of non-ageing situations, such procedures has been described in earlier papers [1][2][3][4]. In order to implement similar procedures taking ageing into account, an adequate representation (i.e.…”

Micro-Macro Analysis of Viscoelastic Unidirectional Laminated Composite Plates Using DR Method

“…For macromechanical analysis of viscoelastic composites, assuming linear viscoelastic properties for the material, the response of the laminated plates was studied under different loading conditions [19][20][21][22]. With nonlinear viscoelastic assumption, Yi [23] developed a FE procedure based on Pipes and Pagano's displacement field for laminates under a generalized state of plane deformation and Schapery's nonlinear constitutive relations.…”