The effect of loading rate, fruit size and loading direction on some of mechanical properties of tangerine (Citrus tangerina)

Ghasem Beigi, Samira (2017) The effect of loading rate, fruit size and loading direction on some of mechanical properties of tangerine (Citrus tangerina). Masters thesis, University of Mohaghegh Ardabili.

Preview

Text (اثر سرعت بارگذاری، اندازه میوه و جهت بارگذاری بر برخی خواص مکانیکی میوه نارنگی) Samira Ghasem Beigi.pdf Download (1MB) | Preview

Abstract

Determinig the physical and mechanical properties of fruit are important in proper design of handling, packaging, storage and transportation system, which result in reduction of mechanical damage and increasing product shelf life.On of garden products that produce in hinterland sizeabley, is tangerine. In this research, technological properties of whole fruit such as physical dimensions, true density, bulk density and porosity and strength properties of fruit, deformation at break point, rupture force, energy rupture and toughness under compression test were determined in two common varieties of tangerine ( Unshio-Clementine). In this relation, the ffect of fruit size (3 levels), loading speed (3 levels) and direction of loading (2 levels) were defined. The results showed that cultivar had a significant effect on the properties of actual density, mass density and porosity at 1% probability level. The actual density of Unshiu cultivar was more than the actual density of Clementine cultivar. Mass density and porosity of Clementine cultivar obtained more than mass density and porosity of Unshiu cultivar. The interaction of loading speed and direction, the interaction of loading speed and size and the interaction of loading and size are only significant for the deformation at the rupture point of the Unshiu cultivar at a probability level of 5%. The triple interaction of loading speed, loading direction and fruit size has become significant only for rupture force and rupture energy at probability level of 5%. The rate of deformation at the point of rupture in the cultivar of Unshiu in transverse loading direction as more than longitudinal loading direction. Unshiu cultivar as thr size increased, the deformation increased at the point of rupture. The force required for rupture is one of the criteria for the strength of material. The highest rupture energy is related to the loading speed of 90 mm per minute, small size and in the longitudinal direction. Tangerine is an anisotropic substance. For the Clementine cultivar, the degree of deformation at the rupture point was increased by changing the direction from longitudinal to transverse mode in all three sizes. For Clementine cultivar, the energy of rupture increased by changing loading direction from longitudinal to transverse mode in all three fruit sizes.

Actions (login required)

View Item