Static and kinetic friction of rapeseed

R. Rusinek and M. Molenda
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R. Rusinek: Institute of Agrophysics, Polish Academy of Sciences, Lublin, Poland
M. Molenda: Institute of Agrophysics, Polish Academy of Sciences, Lublin, Poland

Research in Agricultural Engineering, 2007, vol. 53, issue 1, 14-19

Abstract: he present paper examines the static and kinetic coefficient of friction of rapeseed. The project utilized two methods of determination of coefficient of friction of rapeseed: according Eurocode 1 (kinetic) in direct shear test and (static) in model silo. Samples of rapeseed in a range of moisture content from 6 to 15% w.b. were used and the tests were performed for galvanized steel, stainless steel and concrete B 30. Coefficient of friction for both steel types approached stable value for all levels of moisture content w.b. in a range from 0.11 to 0.18, for concrete B 30 it was found in a range from 0.25 to 0.43. The coefficient of static friction found in model silo decreased with an increase in vertical pressure from 0.3 to 0.2 for first loading, while in subsequent loading cycles decreased from 0.2 to 0.1.

Keywords: rapeseed; static friction; kinetic friction; galvanized steel; stainless steel; concrete B 30 (search for similar items in EconPapers)
Date: 2007
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlrae:v:53:y:2007:i:1:id:2129-rae

DOI: 10.17221/2129-RAE

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