Tarcie ziarna pszenicy

• Autorzy: Molenda M , Horabik J. , Grochowicz M. , Szot B.

Warianty tytułu

EN

Friction of wheat grain

• Języki publikacji: PL

Abstrakty

EN

All phases of particulate material industry, namely, storage, handling and processing are operations that require precise knowledge of the behaviour of the material to achieve the desired control.External and internal friction of particulate material greatly influence its mechanical behaviour.A lot of work was done on agricultural grain since 1960`s. This work summarizes the methods and results of these studies and presents the results of the autor1s own experiments. It was divided into two parts: 1.Internal friction and 2. External friction. Own studies for the first section were performed using direct shearing box and triaxial compression chamber which dimensions were anlarged to regard the size of cereal grain. Density, moisture content of grain and its spatial orientation were taken into account as the most important factors forinternal friction. All of them were found to influence significantly the angle of internal friction of grain. For the external friction section own method of measurements was applied. Friction coefficient was measured for a part of wheat grains sliding against a steel or glass platesandwiched between them. The true contact area of grain with a flat glass surface was measured with microscope photography in reflected light. The relations between tangential force and normal force on the one hand and the true contact area versus normal force on the other were obtained and examined. Parameters taken into account were: grain moisture content, type of endosperm, cutin cover, variety, location of cultivation, and roughness of sliding surface and that of grain itself. All these factors were found to influence significantly obtained frictional characteristics. The obtained results pointed out to the fact that both internal and external friction of cereal grain depend on a number of factors which caused unexplained scatter of experimental results, and in a greater part of theoretical works were left out of account.

Słowa kluczowe

PL

agrofizyka; materialy sypkie; zboza; pszenica; ziarno; wilgotnosc ziarna; gestosc ziarna; tarcie zewnetrzne; tarcie wewnetrzne; wspolczynnik tarcia; metody pomiarow; przyrzady pomiarowe; wlasciwosci mechaniczne; procesy technologiczne

EN

agrophysics; granular material; cereal; wheat; grain; grain moisture; grain density; external friction; internal friction; friction coefficient; measurement method; measurement device; mechanical property; technological process

• Wydawca: -
• Czasopismo: Acta Agrophysica
• Rocznik: 1995
• Tom: 04
• Opis fizyczny: s.88,tab.,wykr.,bibliogr.

Twórcy

autor

Molenda M

autor

Horabik J.

autor

Grochowicz M.

autor

Szot B.

Bibliografia

• 1. Balassy Z., Horahik J., Molenda M : On friction proper lies uf wheat grain, Zeszyty Problemowe PNR, z. 378, 1989, str. 11-19.
• 2. Balassy Z.: On friction properties of corn crops, Sbomik '85 mechanizacni fatuity VSZ v Praze, 1985,pp. 27-32.
• 3. Bowden F.P„ Tabor D.: Wprowadzenie do trybologii, Warszawa: WNT 1980.
• 4. Brubaker J.E., Pos J.: Determining static coefficients of friction of grains on structural surfaces, Transactions of the ASAE, vol 1, 1965, pp. 53-55.
• 5. Buck Icy D.H.: Surface effects in adhesion, friction, wear and lubrication, A insterdam-Ox ford-New York: Elsevier Scientific Publishing Company 1981.
• G. Bucklin R.A., Thompson S.A., Ross I.J., Biggs R.H.: Apparent coefficient of friction of wheal on bin wall material, Transactions of the ASAE, vol. 5, 19X9, pp. 1769-1773.
• 7. Canadian Farm Building Code. National Research Council of Canada, Ottawa 1977,
• 8. Cyrus P.: Tribometer for mens a ring the friction coefficient of grain during the shearing an sliding support plate. Shornik '85 mechanizacni lakulty VSZ v Prace. 1985, pp. 17-23.
• 9. Drozdow J.N., Pawlow W.G., Puczków W.N.: Trienie i iznos w ekstriemalnych usłowiach, Moskwa: Maszinostrojenie 1986.
• 10. Ducho P., Lobotka J., Zahorsky J.: Friction coefficient in I me me and maize at way - milky maturity in motion. Acta technologita agriculiurae, Nilra 1967, pp. 93-105.
• 11. Fiala J.: Trent zemedehkych materiału, Zemedelska technika, nr 4. I965, sir 205-550
• 12. Frontczak J., Metzger T : The studies an the slip angle geometrical features of corn grain in the moisture function, Sbomik '85 mechanizacni fakulty VSZ v Praze, 1985. pp. 225-238.
• 13. Grochowicz J.: Maszyny do czyszczenia i sortowania nasion, Warszawa: PWRiL 1971.
• 14. Grochowicz M., Grundas S., Molenda M.: Urządzenie do pomiaru siły tarcia zewnętrznego materiałów sypkich, zwłaszcza ziarna zbóż, Patent UP PRL nr 120183, Waraszawa, 1983.
• 15. Grochowicz M., Grundas S., Molenda A device for the investigation of the external friction of a grain medium, Proc. of the 2nd Intern. Conf. " Physical properties of agricultural malerials", Godollo, Hungary, 1980, nr 12.
• 16. Grzesiuk S., Kulka K.: Fizjologia i biochemia nasion. Warszawa: PWRiL 1981.
• 17. Haman J.: Rheotogical properties of cereals and their theoretical interpretation, Zeszyty Problemowe PNR. z. 203, 1978, sir. 107-122.
• 18. Hanzelik F., Keleman P., Tomovcik J.: Deformation and friction of wheat grams. Acta technologia agricultural Nitra 1968, pp. 30-42.
• 19 Hebda M., Wachal A.: Trybologia, Warszawa: PWN 1980.
• 20. Hendrick J.G., Bailey A.C.: Determining components of soil - metal sliding resistance. Transactions of the ASAE. 1982, pp. 845-849.
• 21. Hnilita P. Velikanov L.P., Grundas S.: Distribuce husloly a rentgenograficka studie lomu endospermu psenice, Zemedelska Technika, nr 8, Praha 1989, sir. 471-484.
• 22. Hnilica P., Gran S.: Me rent dynamickeho Youngova mudulu endospermu obili, Zemedelska Technika, nr 3, Praha 1983, str. 65-80.
• 23. Horabik J., Molenda M.: The true contact area between wheat grain and fiat surface. Zeszyty Problemowe PNR, z. 378, 1989 str. 63-68.
• 24. Horabik J., Molenda M.: Force and contact area of wheat grain in friction. J. agric. Engng Res. vol. 41, 1988, pp. 33-41.
• 25. Jaszczericyn P.I., Skorynin J.W.: Robotospnsohnost uzlow trienia maszin Minsk: Nauka i tiechnika 1984.
• 26. Katz K., Cardwell A H., Collins N.D., Hosicitcr A.E.: A nev grain hardness tester. Cereal Chemistry vol. 5, 1959, str. 393-401.
• 27. Kendall M.G., Buckland W.U.: Słownik terminów statystycznych. Warszawa: PWE 1986.
• 28. Kolowca J., Ślipek Z.: The influence of glossiness on the mechanical resistance of wheat grain. Zeszyty Problemowe PNR, .203, 1878, str 41-44.
• 29. Koper R.: Determination of the mechanical properties of wheat grain by means of holographic interferometry, Proc, of II. Int. Conf. „Physical prop, of agric. materials". Godollo, Hungary,1980, nr 107.
• 30 Kragiclskij I.W., Dobyczin M.N., Kombalow W.S.: Osnowy rasczetow na trienie i iznos, Moskwa: Maszinosl rojenie 1977.
• 31.Kragielskij I.W., Lankow A.A.: O primienimosti formuł Gierca dla razczieta konturnoj ploszczadi. O pn rodle trienijn twiordych tie I, Mińsk: Nauka i tiechnika, 1971. str. 307-3 J 5,
• 32.Kuizbach H.D., Scherer R.: Das Reihverhalten von Korne rfruchten - Eine Schrifturnsubersicht, Grundl. Landtechnik nr 6, 1977, str. 213-219.
• 33.Lawion P.J.: Coefficients of friction between cereal grain and various silo wall materials, J. agric. En grig Res. vol. 25, 1980, pp. 75-86.
• 34.Leszek W„ Zwierzycki W.: Współczesna interpretacja pojęć tarciowych i zużyciowych, Trybologia nr 2, 1987, str, 4-7.
• 35.Linhart H,, Zucchini W.: Model selection, New York: John Wiley and Sons ¡986.
• 36.Lobotka J.: Koefictenty trenia rezanej hmoty krmovin, Zemedelska technika nr 13, 1967, str. 81-93. 37
• 37.Mohsenin N.N.: Physical properties of plant and animal materials. New York-London-Paris: Gordon and Breach Scicnce Publishers 1978.
• 38. Molenda M.: A method of determining friction coefficients of wheat grains on metal surfaces. Zeszyty Problemowe PNR zJOt, 1985, pp. 139-145.
• 39. Molenda M.: Pomiar siły tarcia zewnętrznego warstwy ziarna pszenicy i pojedynczych ziarniaków o powierzchnię metalową. Zeszyty Problemowe PNR, z.320, 1987, str. 159-168.
• 40. Molenda M.: Identyfikacja elementarnych mechanizmów tarcia ziarna pszenicy. Praca doktorska. Instytut Agrofizyki PAN. Lublin 1991.
• 41. Moore D.W., White G.M., Ross I.J.: Friction of wheat on corrugated metal surfaces, Transactions of the ASAE vol. 6, 1984, pp. 1842-1847.
• 42. Moysey E.B., Hiltz Shane: Friction properties of fertilizers, Canadian Agricultural Engineering, nr 2, 1985, str. 79-83.
• 43. O prirodie trienia twiordych tiei. Praca zbiorowa, Mińsk: Nauka i tiechnika 1971.
• 44. Procter D.C., Barton R.R.: Measurements of the angle of mterpartide friction, Geoteehjiique, nr 4, 1974, pp 581-604.
• 45. Rademacher F.J.C.: Accurate measurement of the kinetic coefficient of friction between a surface and a granular mass, Powder Technology, vol. 19, 1978, pp. 65-77.
• 46. Ralczew A., Barow W.: Nowyj pribor dla opredelenija koefficiema wniesznowo trenija, Problemy obraborki poczwy , Sofia 1970, str. 169-177.
• 47. Richter D.W.: Friction coefficients of some agricultural materials, Agricultural Engineering, June 1954, pp. 411-413.
• 48. Scherer R„ Kutzhach H.D.: Mechanishe Eigenshaften von Kornerfruchten, Grundlagen Landtechnik nr 1. 1978, str. 6-12.
• 49. Schwab CV.: Grain pressure phenomenon in a circular flat bottom bin, Praca doktorska, Uniwersytet Kentucky, Lexington 1989.
• 50. Schwedes J.: Evolution of butt solids technology since 1974, Bulk Solids Handling, vol. 3, 1983, pp. 143-148.
• 51. Schwedes J.: Influence of wall friction on silo design in process and structural engineering, German Chemical Engineering, vol. 8, 1985, pp. 31-138.
• 52. Shanna V.K., Drew L.O., Nelson G.L.: High frequency vibrational effects on soil - metal friction. Transactions of the ASAE, 1977, pp. 46-51,
• 53. Singh Divgir, Moysey E.B.: Grain bin wall pressures: Theoretical and experimental, Canadian Agricultural Engineering vol. 1, 1985, pp. 43-48.
• 54. Sitkei G.: Mechanics of agricultural materials, Budapeszt: Akademiai Kiado 1986,
• 55. Snyder L.H., Roller W.L., Hall G.E.: Coefficients of kinetic friction of wheat on various metal surfaces, Transactions of the ASAE, vol. 3, 1967, pp, 411-419.
• 56. Solski P„ Ziemba S.: Zagadnienia tarcia suchego. Warszawa: PWN 1965.
• 57.Stewart B.R., Hossain Q.A., Kunze O.R.; Friction coefficients of sorghum grain on steel, teflon and concrete surfaces. Transactions of the ASAE, vol. 4, 1969, pp. 415-418.
• 58.Storage of cereal grains and their products, Praca zbiorowa. St. Paul, Minnesota: American Association of Cereal Chemistslnc. 1982.
• 59.Szot B.: Metodyczne aspekty oceny cech fizycznych ziarna pszenicy. Roczniki Nauk Rolniczych, seria D, tom 160. Warszawa: PWN 1976.
• 60.Szot B„ Horabik J., Molenda M.: The effect of the spatial orientation of cereal grain in bulk on its mechanical behaviour, Sbornik '85 mechanizacni fakulty VSZ v Pruze, 1985, pp. 873-878.
• 61.Thompson S.A., Ross I.J.: Compressibility and frictional coefficients of wheat. Transactions of the ASAE, vol. 4, 1983, pp. 1171-1180.
• 62.Thompson S.A., Ross I.J.: Compressibility artdfrictional coefficient of wheat. Transactions of the ASAE, 26(4), 1171-1176. 1983.
• 63.Thompson S.A., Bucklin R.A., Balich C.D., Ross I.J.: Variation in the apparent coefficient of friction of wheat on galvanized steel, Transactions of the ASAE, 31(5), 1518-1524, 1988.
• 64.Tieoria inertia i iznosa. Praca zbiorowa Moskwa: Nauka 1965.
• 65.Timoshenko S.P., Goodier J.N.: Theory of elasticity, Tokio: Kogakusha Company Ltd., 1970.
• 66.Tomczyk S.: Magazyny ziarna i innych nasion. Warszawa: PWRiL 1970.
• 67.Tsang-Mui-Chung M. Venna L. Lalit, Wright M.E.: A device for friction measurement of grains. Transactions of the ASAE, vol. 4,1984, pp. 1938-1944.
• 68.Visser J,: Adhesion of colloidal particles. Surface and colloid science. New York: John Wiley and Sons 1976.
• 69.Woźniak W.: Wpływ czynników agrofizycznych na zmienność porowatości masy ziarna, Zeszyty Problemowe PNR , z. 316, 1987. str. 257-276.
• 70.Zhang Q., Puri V,M„ Manbeck H.B.: Model for frictional behaviour of wheat on structural materials. Transactions of the ASAE, vol. 3, 1988, pp. 898-903.