some physical and mechanical properties of ghasri variety of melon

in this study, the physical properties (size, mass, volume, density, geometric diameter, sphericity and friction coefficient on galvanized steel and wood surface) and some mechanical properties of flesh and skin tissue (modulus of elasticity, bioyield stress, yield strain and toughness) for small, medium and large melons of ghasri variety were determined. means comparison was done by duncan’s method. the results showed that the density, sphericity index and the mechanical properties of melon’s flesh decreased with increasing the size of ghasri melon, but the mechanical properties of skin increased. the highest values of modulus of elasticity, bioyield stress and toughness of melon skin were obtained for the large size of melon, these values were respectively: 22.4 mpa, 0.93 mpa and 62.18 n.mm. the highest values of density, sphericity, modulus of elasticity, bioyield stress and toughness of flesh were obtained for small size, these values were respectively: 1.11 gr/cm3, 0.624, 156.8kpa, 21.19 kpa, 31.82 n.mm