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Physical and Mechanical Properties of Jatropha curcas L. Fruits from Different Planting Densities |
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Azmi Yahya,
Khairunnisa Hamdan,
Tajudeen Abiodun Ishola and Hadi Suryanto |
Abstract:
Jatropha curcas L. is a versatile and rugged crop with
enormous unexploited potentials. In order to efficiently take advantage of its
full potentials, its physical and mechanical properties need to be well understood.
Laboratory tests were conducted to investigate the properties of Jatropha
curcas L. fruits obtained from trees of three planting densities namely
10880, 5446 and 3630 plants acre-1. The properties included detachment
force, rupture force, deformation at rupture point, deformation ratio at rupture
point, hardness, energy used for rupture at both vertical and horizontal loading
positions. Other properties studied were 1000 unit mass, dimensions, sphericity,
bulk density, solid density, porosity, coefficient of static friction on plywood,
steel and stainless steel. The solid density value of 0.97 g cm-3 was
obtained which implies that the fruit could float in water for easy cleaning
and separation from foreign materials. It was observed that the fruit had the
least coefficient of static friction on stainless steel (0.44). The average
values obtained for the detachment force and rupture force at vertical orientation
were 16.62 N and 57.17 N, respectively. No clear cut trend was observed in the
physical and mechanical properties with respect to planting density. However,
the mechanical properties were significantly different with respect to the orientation
of the fruits. Both the physical and mechanical properties are essential for
the design and development of harvesting and processing machines for Jatropha
curcas L. fruit.
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How to cite this article:
Azmi Yahya, Khairunnisa Hamdan, Tajudeen Abiodun Ishola and Hadi Suryanto, 2013. Physical and Mechanical Properties of Jatropha curcas L. Fruits from Different Planting Densities. Journal of Applied Sciences, 13: 1004-1012.
DOI: 10.3923/jas.2013.1004.1012
URL: https://scialert.net/abstract/?doi=jas.2013.1004.1012
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