Anisotropic Relaxation and Creep Properties of Apple (cv. Shafi Abadi and Golab Kohanz)

Creep and stress relaxation are two important phenomena observed in viscoelastic materials. In this study creep and stress relaxation properties of two Iranian apples varieties (Shafi Abadi and Golab Kohanz) was investigated. A model based on generalized Maxwell model (contain of a single Maxwell model in parallel with a free spring) was used for determination of relaxation model and a model based on Burger model which is the series combination of the Kelvin and Maxwell models was used to fit the measured creep data. The decay modulus, the equilibrium modulus, time of relaxation, and specific viscosity in the relaxation model and instantaneous elastic modulus retardation time and coefficient of viscosity associated with Newtonian flow in creep model were determined.

並列關鍵字

Creep ； decay modulus ； equilibrium modulus ； retardation time ； relaxation time

國際替代計量

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