Commenced in January 2007
Paper Count: 32129
Effect of Moisture Content and Loading Rate on Mechanical Strength of Brown Rice Varieties
Abstract:The effect of moisture content and loading rate on mechanical strength of 12 brown rice grain varieties was determined. The results showed that the rupture force of brown rice grain decreased by increasing the moisture content and loading rate. The highest rupture force values was obtained at the moisture content of 8% (w.b.) and loading rate of 10 mm/min; while the lowest rupture force corresponded to the moisture content of 14% (w.b.) and loading rate of 15 mm/min. The 12 varieties were divided into three groups, namely local short grain varieties, local long grain varieties and improved long grain varieties. It was observed that the rupture strength of the three groups were statistically different from each other (P<0.01). It was revealed that the brown rice rupture at lower levels of moisture content was in the form of sudden failure with less deformation; while at higher levels of moisture content the grain rupture was in the form of gradually crushing with more deformation.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1077857Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 1337
 FAO, "Rice production," http://faostat.fao.org. 2007.
 T.J. Siebenmorgen, "Role of moisture content in affecting head rice yield," Rice Sci. Tech., vol. 15, pp. 341-380, 1994.
 Y.B. Li, C.W. Cao, Q.L. Yu, and Q.X. Zhong, "Study on rough rice fissuring during intermittent drying," J. Drying Tech., vol. 17, no. 9, pp. 1779-1793, 1999.
 G.F. Kamst, C. Bonazzi, J. Vasseur and J.J. Bimbenet, "Effect of deformation rate and moisture content on the mechanical properties of rice grains," Trans. ASAE., vol. 45, no. 1, pp. 145-151, 2002.
 Y.S. Kang, C.K. Spillman, J.L. Steele and D.S. Chung, "Mechanical properties of wheat," Trans. ASAE., vol. 38, no.2, pp. 573-578, 1995.
 P.C. Bargale, J. Irudayaraj and M. Bruno, "Studies on rheological behavior of canola and wheat," J. Agric. Eng. Res., vol. 61, no. 4, pp. 267-274, 1995.
 K.K. Singh and T.K. Goswami, "Mechanical properties of cumin seed under compressive loading," J. Food Eng. Vol. 36, no. 3, pp. 311-321, 1998.
 R.K. Gupta and S.K. Das, "Fracture resistance of sunflower seed and kernel to compressive loading," J. Food Eng. Vol. 46, pp. 1-8, 2000.
 L.O. Ogunjimi, N.A. Aviara and O.A. Aregbesola, "Some engineering properties of locust bean seed," J. Food Eng. Vol. 55, no. 2, pp.95-99, 2002.
 M.H. Saiedirad, A. Tabatabaeefar, A. Borghei, M. Mirsalehi, F. Badii and M Ghasemi Varnamkhasti, "Effects of moisture content, seed size, loading rate and seed orientation on force and energy required for fracturing cumin seed (Cuminum cyminum Linn.) under quasi-static loading," J. Food Eng. Vol. 86, pp. 565-572, 2008.
 A. Gorji, A. Rajabipour and H. Tavakoli, "Fracture resistance of wheat grain as a function of moisture content, loading rate and grain orientation," AJCS vol. 4, no. 6, pp. 448-452, 2010.
 H. Zareiforoush, M.H. Komarizadeh and M.R. Alizadeh, "Effects of crop-machine variables on paddy grain damage during handling with an inclined screw auger," Biosyst. Eng. Vol. 106, no.3, pp. 234-242, 2010.
 R.K. Jain and S. Bal, "Properties of pearl millet," J. Agric. Eng. Res. Vol. 66, pp.85-91, pp. 1997.
 N.N. Mohsenin, "Physical properties of plant and animal materials," 2nd ed. New York: Gordon and Breach Science Publishers, 1986.
 E. Altuntas and M. Yildiz, "Effect of moisture content on some physical and mechanical properties of faba bean (Vicia faba L.) grains," J. Food Eng., vol. 78, pp. 174-183, 2007.
 M. Konak, K. Carman and C. Aydin, "Physical properties of chick pea seeds," Biosyst. Eng. Vol.82, no. 1, pp.73-78, 2002.
 R.M. Paulsen, "Fracture resistance of soybeans to compressive loading," Trans. ASAE. vol. 21, no. 6, pp. 1210-1216, 1978.
 M. Liu, K. Haghighi, R.L. Stroshine and E.C. Ting, "Mechanical properties of the soybean cotyledon and failure strength of soybean kernels," Trans. ASAE. vol. 33, no. 2, pp. 559-566, 1990.
 G.C. Zoerb, "Instrumentation and measurement techniques for determining physical properties of farm products," Trans. ASAE. vol. 10, no. 1, pp. 100-113, 1967