Mechanical Properties of Pea Pods (Pisium sativum Var. Shamshiri)

Authors: M. Azadbakht, N. Tajari, R. Alimoradzade

Abstract:

Knowing pea pods mechanical resistance against dynamic forces are important for design of combine harvester. In pea combine harvesters, threshing is accomplished by two mechanical actions of impact and friction forces. In this research, the effects of initial moisture content and needed impact and friction energy on threshing of pea pods were studied. An impact device was built based on pendulum mechanism. The experiments were done at three initial moisture content levels of 12.1, 23.5 and 39.5 (%w.b.) for both impact and friction methods. Three energy levels of 0.088, 0.126 and 0.202 J were used for impact method and for friction method three energy levels of 0.784, 0.930 and 1.351 J. The threshing percentage was measured in each method. By using a frictional device, kinetic friction coefficients at above moisture contents were measured 0.257, 0.303 and 0.336, respectively. The results of variance analysis of the two methods showed that moisture content and energy have significant effects on the threshing percentage.

Keywords: Pea pod, Energy, Friction, Impact, Initial moisture content, Threshing.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1090524

References:

[1] R. Andy, and P. Rudra, Introduction to statics and dynamics, E-Publishing Inc; p. 422–497.Oxford University Press, 2010.
[2] ASAE, Agricultural engineering handbook of standard. American society of agricultural engineers, Michigan St. Joseph, 1979.
[3] M. Azadbakht, M. H. Khoshtaghaza, B. Gobadian, and S. Minaei, Mechanical properties of soybean pod as a function of moisture content and energy, Journal of Agricultural Technology. Vol. 8(4): 1217-1228, 2012.
[4] M. Azadbakht, E. Esmaeilzadeh, and A. H. Shahabi, Investigation the mechanical behavior of canola pods versus effect of impact and friction forces, Journal of Agricultural Technology. Vol. 9(5): 1035-1044, 2013.
[5] A. Biabani, Effect of Planting Patterns (row spacing and plant to plant in row) On the green yield Pea garden (Pisum sativum var. Shamshiri), J. Agric. Sci. Natur. Resour., Vol. 15(5) 2008.
[6] N. R. Branderburg, and J. K. Park, Experimental seed combine, Transactions of the ASAE 25(3): 598-602, 606, 1982.
[7] D. F. Cain, and R. G. Holmes, Evaluation of soybean impact damage, American Society of Agricultural Engineering. Paper Number 77-1552, ASAE, St. Joseph, MI 49085, 1977.
[8] M. E. De Simone, C. Gracia lopez, and R. R. Filgueira, Mechanical threshing dry beans pods, ASAE Meeting Presentation. No: 006066, 2000.
[9] M. Hoki, and K. Pickett, Factors affecting mechanical damage of navy beans, Trans. Of the ASAE, 16(6): 1154-1157, 1973.
[10] D. E. Green, L. E. Cavanah, and E. L. Pinnell, Effect of seed moisture content, field weathering, and combine cylinder speed on soybean seed quality. Crop science, 6: 7-10, 1966.
[11] J. Khazaei, M. Behrouzilar, A. Rajabipour, and S. Mohtasebi, Effect of impact velocity, moisture content, and pod size on percentage of damaged grains and threshed pods in a finger type combine thresher. Iranian J. Agric. Sci. 34(4): 825-836, 2003.
[12] C. M. Mesquita, and M. A. Hanna, Soybean threshing mechanics: І. Frictional rubbing by flat belt. Trans. of the ASAE, 36 (2): 275-279, 1993.
[13] D. L. Hoag, Properties related to soybean shatter. Trans. of the ASAE 15 (3): 494–497, 1972.
[14] N. Parkobboon, A study of abnormal seedling development in soybean as affected by threshing injury. Seed Science and Technology, 10: 495-501, 1982.
[15] M. R. Paulsen, W.R. Nave, and L. E. Gray, Soybean seed quality as affected by impact damage. Trans. of the ASAE. 24(6):1577-1582, 1981.
[16] L. H. Skromme, Progress report on twin rotor combine concept of rotary threshing and separation. In Proceedings of the First International Grain and Forage Harvesting Conference, 188-191, 195. St. Joseph, MI: ASAE, 1977.Anonymous, CAV distributor Type Fuel Injection Pumps, Type DPA, Instruction Book. Acton, London, W.3. Publication No, 2068/4.