Fracture resistance of sunflower seed and kernel to compressive loading

Gupta, Rakesh; Das, Susanta Kumar

doi:10.1016/s0260-8774(00)00061-3

Cited by 134 publications

(141 citation statements)

References 12 publications

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“…Comparing this results with previous studies on the mechanical behaviour of one seed under compression loading where unit deformation energy, rupture force and rupture compressive stress were determined, the results obtained in the present study were in agreement with the pressing of rapeseed Unal et al, 2009), jatropha seed (Karaj and Muller, 2010;Sirisomboon et al, 2007), sunflower seed (Gupta and Das, 2000;Perez et al, 2007). Also the position of oil points on the deformation characteristics of the various oilseeds corresponds to similar studies reported by (Faborode and Favier, 1996;Figueiredo et al, 2011;Sayyar et al, 2009) and also the shapes of deformation characteristic are significant to the characteristics described by (Gupta and Das, 2000;Herak et al, 2010;Kabutey et al, 2011;Rusinek et al, 2007),…”

Section: Resultssupporting

confidence: 89%

“…In the literature, considerable information about the mechanical behaviour of the oilseed crops namely rapeseed Rusinek et al, 2007;Unal et al, 2009); sunflower seed (Gupta and Das, 1997;2000;Isik and Izli, 2007;Perez et al, 2007), and jatropha seed (Herak et al, 2010;Karaj and Muller, 2010;Sirisomboon et al, 2007), have been focused on rupture force and deformation characteristics (Fomin et al, 1978;Herak et al, 2011a;Kabutey et al, 2011;Koegel et al, 1973;Mrema and Mc Nluty, 1985), unlike the mathematical description of the deformation characteristics, limit deformation ratio, maximal deformation ratio, energy ratio and oil point deformation ratio.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the Mechanical Behaviour of Selected Oilseeds under Compression Loading

Herák

Kabutey

Divišová

et al. 2012

Not Bot Hort Agrobot Cluj

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The present study provides information about the comparison of mechanical behaviour of selected oil bearing crops namely rapeseeds (Brassica napus L.), sunflower seeds (Helianthus annus L.) and jatropha seeds (Jatropha curcas L.) under compression loading. In this research, the compression device ZDM 50 with a chart recorder and a pressing vessel with diameter 100 mm were used to determine the relationship between the magnitude of the pressing force and deformation characteristics of the oilseed crops pressed at initial height 80 mm. From the compression test, the amounts of true deformation, maximal deformation energy and compressive force of the pressed samples were calculated and also mathematical equations describing the limit deformation, maximal deformation ratio, energy ratio and oil point deformation ratio were determined. The oil point position on the deformation curve, that is, the first leakage of oil from the pressing vessel of the various oilseeds was determined and compared. Based on the measured amounts rapeseeds achieved the highest values followed by jatropha seed and then sunflower seed. The amount of deformation energy required for the seed deformation gives the indication the amount of energy needed for obtaining the oil from the seed. It was found that the measured amounts as well as the oil point position on the force-deformation curve of the pressed samples showed varying results due to the seeds physical and inherent characteristics.

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Section: Resultssupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Comparison of the Mechanical Behaviour of Selected Oilseeds under Compression Loading

Herák

Kabutey

Divišová

et al. 2012

Not Bot Hort Agrobot Cluj

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“…4): a load cell connected to a stationary upper platen; a lower platen mounted to a driving unit; and a PC equipped with a daS. after placing a single seed on the lower platen, the lower platen moved up with a fixed speed of 0.027 mm s -1 (Bilanski 1966;Braga et al 1999;aSaE 2000;Gupta & das 2000) and the seed was longitudinally compressed between the two parallel platens until the seed ruptured. The load cell sensed the force applied to the single seed which increased over time until the seed ruptured and transmitted the data to the daS.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Physico‐mechanical seed properties of the common Turkish bean (Phaseolus vulgaris) cultivars ‘Hinis’ and ‘Ispir’

Öztürk¹,

Kara

Yildiz

et al. 2009

New Zealand Journal of Crop and Horticultural Science

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41Physico-mechanical seed properties of the common Turkish bean (Phaseolus vulgaris) for 'Hinis' and 'Ispir', respectively. The average 1000 seed weight, bulk density, and porosity were determined as: 531.3 and 598.9 g, 835.8 and 872.7 kg m -3 , and 34.0% and 33.1% for 'Hinis' and 'Ispir', respectively. The average angle of repose and terminal velocity were 24.52° and 19.46°, and 11.42 and 11.80 m s -1 in 'Hinis' and 'Ispir' respectively. The highest coefficient of dynamic friction was obtained with an aluminium surface in both cultivars as 0.227 for 'Hinis' and 0.199 for 'Ispir'. This was followed by fibreglass, steel, plywood, and glass surfaces. Both cultivars had white testae. The average value of rupture force, deformation at rupture point, energy absorbed, hardness, and toughness along the

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“…Figure 2. The biological yielding was not observed, and for both directions rupture was similar to that of fragile materials such as sunflower seeds (GUPTA & DAS, 2000). FIGURE 2.…”

Section: Drying Castor Fruitsmentioning

confidence: 89%

Mechanical properties of castor beans subject to different drying temperatures aiming to disrupt the bean coat

Bastos¹,

Ferraz

2014

Eng. Agríc.

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ABSTRACT:In castor oil extraction process, the bean coat is abrasive to the equipment and releases substances that modify the oil color, reducing its quality. A potential solution would be to run the extraction by compressing only the endosperm. Due to lack of information, the objective of this study was to evaluate the influence of forced air drying at 40, 60, 80 and 100 ºC and farmyard drying, in the mechanical properties of the beans, aiming to break the bean coat. Castor beans were subjected to compression tests, in two perpendicular directions, at a strain rate of 0.6 mm.s-1. Average values of force, deformation energy, strain, all at rupture, and stiffness were used to evaluate the effects of dehydration. It was observed that the heat treatments did not alter the mechanical properties of castor beans, the strain and stiffness values discriminate the differences between the directions and had the lowest coefficients of variation. It was concluded that forced air drying, more costly than farmyard drying, does not bring benefits to the decortication. However, regardless the heat treatment used, the mechanical stress lengthwise is the most suitable to promote decortication. KEYS-WORDS:conditioning, threshing, decortication, compression. PROPRIEDADES MECÂNICAS DOS GRÃOS DE MAMONA SUBMETIDOS A DIFERENTES TEMPERATURAS DE SECAGEM A VISANDO A RUPTURA DO TEGUMENTO RESUMO:No processo de extração do óleo de mamona, o tegumento libera substâncias que modificam a coloração do óleo, reduzindo a qualidade, e causa abrasão nos equipamentos. Potencialmente, uma solução para esse problema seria executar a extração prensando somente o endosperma. Devido à carência de informações, o objetivo deste trabalho foi avaliar a influência da secagem com ar forçado a 40; 60; 80 e 100 ºC e secagem em terreiro, nas propriedades mecânicas dos grãos, visando ruptura do tegumento. Grãos de mamona foram submetidos a ensaios de compressão, em duas direções perpendiculares, com taxa de deformação de 0,6 mm.s -1 . Valores médios da força, energia de deformação, deformação específica, todos na ruptura, e rigidez foram utilizados para a avaliação dos efeitos da secagem. Observou-se que, nas condições consideradas, os tratamentos térmicos não alteraram as propriedades mecânicas dos grãos de mamona e que os valores de deformação específica e rigidez discriminaram as diferenças entre as direções e apresentaram os menores coeficientes de variação. Concluiu-se que a secagem com ar forçado, mais oneroso que a secagem no terreiro, não traz benefícios à decorticação. No entanto, independentemente do tratamento térmico, a solicitação mecânica do grão na direção longitudinal é a mais indicada para promover a decorticação.

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Fracture resistance of sunflower seed and kernel to compressive loading

Cited by 134 publications

References 12 publications

Comparison of the Mechanical Behaviour of Selected Oilseeds under Compression Loading

Comparison of the Mechanical Behaviour of Selected Oilseeds under Compression Loading

Physico‐mechanical seed properties of the common Turkish bean (Phaseolus vulgaris) cultivars ‘Hinis’ and ‘Ispir’

Mechanical properties of castor beans subject to different drying temperatures aiming to disrupt the bean coat

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