A Study on Rupture Resistance of Groundnut (cv. SAMNUT 22) Kernel

Authors : Hilary UGURU, Ovie Isaac AKPOKODJE, Ebubekir ALTUNTAŞ

Pages : 19-33

View : 16 | Download : 14

Publication Date : 2021-06-30

Article Type : Research Paper

Abstract :This study was done to assess the influence of compression loading rate and kernel size on the rupture resistance of groundnut insert ignore into journalissuearticles values(cv. SAMNUT 22); kernel. These groundnut kernel mechanical parameters insert ignore into journalissuearticles values(rupture force, deformation at rupture, rupture power, firmness and toughness); were evaluated under three loading rates insert ignore into journalissuearticles values(15 mm min-1, 20 mm min-1 and 25 mm min-1);, and three size categories insert ignore into journalissuearticles values(small, medium and large);. The groundnut kernels were harvested at peak maturity stage, and tested in accordance to ASTM International standards. Results obtained from the tests showed that the rupture resistance of SAMNUT 22 kernel was highly dependent on its size and the loading rate. Generally, as the loading rate increases, the mechanical parameters values declined significantly insert ignore into journalissuearticles values(p ≤ 0.05);. Rupture force, deformation at rupture point, rupture power and the firmness increased as the kernel size increases; but in contrast, the kernel toughness decreases as its size increased. An average force of 57.96 N ruptured the large kernel, while a lower force of 27.35 N ruptured the small kernel. Moreover, the large kernel recorded the highest firmness insert ignore into journalissuearticles values(59.03 N mm-1);, when compared to the medium insert ignore into journalissuearticles values(51.69 N mm-1); and small insert ignore into journalissuearticles values(44.98 N mm-1); size kernel. In terms of rupture power, the small kernel power ranged from 0.1002 W insert ignore into journalissuearticles values(15 mm min-1); to 0.084 W insert ignore into journalissuearticles values(25 mm min-1);; medium size kernel ranged from 0.115 W insert ignore into journalissuearticles values(15 mm min-1); to 0.074 W insert ignore into journalissuearticles values(25 mm min1);; while the large size kernel ranged from 0.135 W insert ignore into journalissuearticles values(15 mm min-1); to 0.104 W insert ignore into journalissuearticles values(25 mm min-1);. These results portrayed importance of sorting of the groundnut kernels before processing unit operation, as it will help to conserve power and energy during the processing operation.
Keywords : Groundnut, Kernel size, Loading rate, Mechanical properties, Mechanical properties, Rupture power