Characterization of Viscoelastic Behavior of Ripe Deseeded Tamarind Subjected to Uniaxial Compressive Loading

Abstract

The creep behavior a rheological property of tamarind (Tamarandus indica L.) was studied to characterize the effect of compressive stress and time on volumetric reduction in ripe deseeded tamarind and creep curve developed using Kelvin model. Five different compressive stresses 222.95, 445.90, 668.86, 891.81 and 1114.77 N/m2 were used and deformation was observed at different time intervals  0+, 5, 10, 20, 30, 45, 60, 90, 120, 180, 240, 300  and 360 minutes. Creep curve were plotted to demonstrate the volumetric strain variance for various time intervals. The slope of curve is sharp at the beginning and then with the increase in duration of loading the slope of curve flattened down which shows that the rate of change of volumetric strain for a given sample at a given stress is large at the beginning and with increase in the time, the rate of change becomes less and less. The volumetric strain with respect to variation of loading is maximum in case of maximum stress that was 1114.77 N/m2.