Inżynieria Rolnicza
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Title : An attempt to determine surface pressures of apples in the single box in the aspect of its usefulness for transport and storage
Key words : surface pressures, force, apples, box, layer, bed
Summary :

The paper presents results of changes of surface pressures of apples placed in the box depending on the load- the height of a layer. Firstly, compression tests of whole apples were carried out to the level of damage - the moment of reaching the biological resistance limit. Based on curves of forces compression as the function of relocation F = f(ΔL), scopes of forces, which cause local damage to the inside structure of fruit, and the maximum destruction forces were determined Fmax. With the use of Tekscan apparatus, surface pressures of apples were determined in the static conditions due to simultaneous registering of compression forces and the responding surface of contact with the surface of the sensor placed at the bottom of the box. Analysis of the average forces distribution in the selected 5 points proved their varied nature. The maximum values of forces for a middle sphere of the box were obtained and they amounted to 6.83 N at a full loading of the box with three layers of apples. Increase of the contact surface of apples with side walls caused decrease of the surface pressure to the value of 0.034 MPa, whereas in the places of adherence of apples (central sphere of the bottom of the box), a decreased contact surface determined the increase of pressures to 0.082 MPa. The investigation, which was carried out in the conditions of static loads with three layers of apples, prove that a single box constitutes a good object for storing and transport.

Please use the following format to cite the selected article : Komarnicki, P., Stopa, R., Młotek, M. (2013). An attempt to determine surface pressures of apples in the single box in the aspect of its usefulness for transport and storage. Inzynieria Rolnicza, 3(146), 145-157.
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