MECHANICAL PROPERTIES FOR SOME VARIETIES OF OLIVE FRUITS | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 2, Volume 32, Issue 6, June 2007, Page 4565-4574 PDF (766.73 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2007.201297 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A.M. Matouk1; M.M. EL-Kholy1; S. El-Khawaga2; A. Tharwat1 | ||||
| 1Agric. Eng. Dept., Fac. of Agric., Mansoura Univ. | ||||
| 2Agric. Eng. Res. Inst., A.R.C., Dokki. Giza | ||||
| Abstract | ||||
| A study was carried out to determine some mechanical properties for fruits and pits of different olive varieties. The studied varieties included Coratina, Kronaki and Arab queen as oil producing varieties and Picual, Manzanillo and Watiken as duel purpose varieties. The investigated properties for olive fruits included coefficient of friction, repose angel and rolling angle. While hardness, shear force and shear stress were determined for pits. The results show that, the oil producing varieties showed lower friction coefficient in comparison with the duel purpose varieties. Also, the rubber surface recorded highest coefficient of friction followed by the galvanized iron and stainless steal surfaces. On the same time, the fruit repose angle not only affected by the surface roughness of fruits but also the shape and size of fruits as the fruit size increased, the repose angle increased. However, varieties of small size recorded lower rolling angle for all studied surfaces in comparison with varieties of large size. The results also show that, the pit crushing force, shear force, and shear stress were higher for the duel purpose varieties in comparison with the oil producing varieties. | ||||
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