Mechanics of rice grain due to milling process

Ruslan Jais, Nurazlina (2018) Mechanics of rice grain due to milling process. [Project Paper] (Submitted)

Text FK 2018 44.pdf Download (30MB)

Abstract

This research were conducted to determine the effects of drying conditions and moisture contents on the mechanical properties of MR 220 rice variety and analyze the fissure formation in the rice kernels after drying using scanning electron microscope. The samples were dried at 40°C to 90°C for 5 hours of drying. After drying, the rice were subjected to compression test and three-point bending test. The breaking force values for both tests showed that lower breaking force at highest temperature (90°C) which is 74 N and 8. 78 N for compression and three-point bending test, respectively. However, from the results it showed that temperature has no significant effect on breaking force in compression test compare to three-point bending. It was further indicated that, at higher temperature the breaking displacement is lower which are 0.316 mm and 0.079 mm for compression and three-point bending tests, respectively. For effect of moisture contents on the breaking force, both compression and three-point bending test showed highest breaking force at MC of 10% d.b. which are 77 N and 30 N, respectively. Breaking displacement for both tests showed different results where the highest breaking displacement occurred at MC of 17% d.b. which is 0.39 mm for compression test. However, results from three-point bending indicated that the highest breaking displacement occurred at MC of 10% d.b. which is 0.19 mm. Therefore, compression test is no the best option to study the mechanical properties of rice kernel. From photomicrograph of SEM, most and the largest fissures were developed at the highest temperature which is at at 90°C which proved that rice kernel easy to crack at higher temperature. Thus, it that proved severe drying has significant effect on fissure formation of rice grains.

Item Type:	Project Paper
Subjects:	S Agriculture > S Agriculture (General)
Faculty:	Faculty of Engineering
Depositing User:	Ms Siti Mariam Giman
Date Deposited:	29 Apr 2026 09:54
Last Modified:	29 Apr 2026 09:54
URI:	http://psaspb.upm.edu.my/id/eprint/2793

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