THE DIFFERENCE OF RELAXATION PROPERTIES ON PEAR

摘要

The relaxation phenomena are the critical aspect of fruit theological properties. Little detailed information is available on the nonhmogeneus and anisotropic relaxation properties of fruits. The objective of this study was to determine the effects ofspecimen orientation and location with the pear on the equilibrium modulus, the decay modulus, time of relaxation and specific viscosity in the relaxation model. The stress relaxation tests were performed on Dangshan pear. Using the Instron universal testing machine. The decay modulus, the equilibrium modulus, time of relaxation and specific viscosity in the relaxation model are significantly influenced by specimen orientation, latitude, depth. The longitude of specimen and initial deformation are notsignificant.