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Two higher-order fractional viscoelastic material models consisting of the fractional Voigt model (FVM) and the fractional Maxwell model (FMM) are considered. Their higher-order fractional constitutive equations are derived due to the models’ constructions. We call them the higher-order...
A constitutive model for large strain deformation of semicrystalline polymers has been formulated to predict the complex elasto-viscoelastic-viscoplastic material response. The general form of this model can be represented by three parallel rheological components corresponding to each of the...
The properties of the Poisson’s ratio of microcellular foams with an internal pressure in the voids and low porosity are investigated. Of prime interest is the effect of the matrix creep on the deformation of the foam and how this effect influences the later deformation characteristics of the...
The uniaxial tension (loading and unloading), creep and relaxation experiments on high density polyethylene (HDPE) have been carried out at room temperature. The stress–strain behavior of HDPE under different strain rates, creep (relaxation) behavior at different stress (strain) levels have been...
This paper deals with the use of a new bitumen modifier, a reactive prepolymer, based on the reaction of 4,4 ′ -diphenylmethane diisocyanate (MDI) and a low molecular weight polyethylene glycol (PEG). The rheological and thermal behaviours of modified bitumen containing a low MDI–PEG...
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