Apparent Coefficient of Friction of Wheat on Denim

Date
2017-01-01
Authors
Schwab, Charles
Schwab, Charles
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Altmetrics
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Agricultural and Biosystems Engineering
Abstract

Calculation of the extraction force for a grain entrapment victim requires a coefficient of friction between the grain and the surface of the victim. Because denim is a common fabric for the work clothes that cover entrapment victims, the coefficient of friction between grain and denim becomes necessary. The purpose of this research was to calculate the apparent coefficient of friction of wheat on denim fabric using a proven procedure. The expectation is to improve the current understanding of conditions that influence extraction forces for victims buried in wheat. The apparent coefficient of friction of wheat on denim fabric was calculated to be 0.167 with a standard deviation of ±0.013. The wheat had a moisture content of 10.7% (w.b.) and bulk density of 778.5 kg m-3. The apparent coefficient of friction of wheat on denim was not significantly affected by pull speeds of 0.004, 0.008, and 0.021 mm s-1 nor normal grain pressures of 3.2, 4.8, 6.3, 7.9, and 11.1 kPa. This is a beginning of understanding the conditions that influence the extraction forces for grain entrapment victims.

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This article is published as Schwab, Charles V. "Apparent coefficient of friction of wheat on denim." Journal of agricultural safety and health 23, no. 3 (2017): 175-181. doi: 10.13031/jash.12029. Posted with permission.

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