Creep and Stress Relaxation Modeling of Nanoclay and Graphite Platelet Reinforced Vinyl ester Nanocomposites (original) (raw)

2015

Abstract

This paper discusses the viscoelastic behavior of 1.25 and 2.5 wt. % nanoclay and graphite platelet reinforced vinyl ester under short term creep and relaxation tests using a Dynamic Mechanical Analyzer (DMA). Linear viscoelastic models are generally composed of one or more elements such as dashpots and springs that represent the viscous and elastic properties. Stress relaxation data from DMA was used to obtain the elastic parameters based on model constitutive equations. The Standard Linear Solid (SLS) model, which is a physical model, was used for predicting the creep deformation behavior of the vinyl ester nanocomposites over a wide temperature range. This model was chosen because it can describe the stress relaxation and creep behavior of polymers and can also explain the two main deformations of plastics [1]; with the spring representing deformations due to bending and stretching of intermolecular bonds and dashpot represents deformation due to the viscous effect. Some correlat...

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