Study of the Influence of Multiple Step Creep/Creep-Recovery Loading on the Nonlinear Viscoelastic Response of Carbon Fiber Polymer Matrix Composites
نویسنده
چکیده
In the current study the nonlinear viscoelastic response of a polymer matrix composite under multiple creep/creep-recovery loading is presented. The influence of creep/creep-recovery multiple step loading in the overall strain response both viscoelastic and viscoplastic is examined and an attempt for modeling this behaviour is attempted. An increase in the parameters of nonlinearity is observed as well as in the viscoplastic response. Based on modeling of the parameters of nonlinearity the effect of the number of creep/creep-recovery cycles is examined. It is evident that multiple creep/creep-recovery loading has an impact on both the viscoelastic and viscoplastic response of polymers and its composites. Key-Words: composites, viscoelasticity, creep, nonlinear response, Schapery’s model, stress threshold
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