METHODOLOGICAL ASPECTS OF DETERMINING THE COEFFICIENT OF KINETIC FRICTION OF WHEAT KERNELS ON AN INCLINED PLANE
Journal Title: Tribologia - Year 2018, Vol 278, Issue 2
Abstract
One of the most popular methods of determining the coefficient of kinetic friction between a pair of solid objects involves an inclined plane. However, manual measurements of the time taken by a particle to travel a certain distance (usually performed with a stopwatch) and the angle of an inclined plane (on a scale) are not always highly accurate or precise. The coefficient of kinetic friction has to be determined on the assumption that a particle moves in uniformly accelerated motion. The aim of this study was to analyse particles moving in uniformly accelerated motion on an inclined plane and to modify the method of measuring movement parameters. A mechatronic measuring device and a high-speed camera were used to monitor the movement of wheat kernels on a steel friction plate. The experimental variables were the distance between photosensors (length of the measured section) and the kernel’s position relative to the direction of movement. An analysis of the mean values of time taken by particles to travel different distances revealed that the particles were not moving in uniformly accelerated motion. The results indicate that the coefficient of kinetic friction of irregularly shaped particles cannot be determined reliably on an inclined plane. Several recommendations for modifying the test stand were proposed.<br/><br/>
Authors and Affiliations
Stanisław KONOPKA, Ewelina KOLANKOWSKA
Keywords
Related Articles
- EP ID EP402732
- DOI 10.5604/01.3001.0012.6974
- Views 28
- Downloads 0
Właściwości mechaniczne mieszanin polimerowych o przenikających się sieciach przestrzennych
W prezentowanej pracy przedstawiono wyniki badań nad modyfikacją żywicy epoksydowej przez dodatek zsyntezowanych poliuretanów, które będą mogły być zastosowane jako matryce polimerowe w nanokompozytach. Poliuretany (PUR...
VARIOUS MECHANISMS OF CORROSIVE AND MECHANICAL WEAR OF STAINLESS STEEL IN SLIDING PAIRS
The paper presents the results of tests on corrosive and mechanical wear of different kinds of stainless steel (AISI 430, AISI 420, AISI 321 and AISI 304) in solution of 0.5M H2SO4 and in a solution of 3.5% NaCl. The exp...
EFFECT OF GAS NITRIDING PROCESS ON TRIBOLOGICAL PROPERTIES OF CONSTRUCTIONAL STEEL
The paper presents the results of examinations of the structure and tribological properties of nitrided layers produced on constructional steels with use of controlled gas nitriding. The nitriding layers structure, hardn...
INTERACTION OF NOVEL LUBRICANT ADDITIVES BASED ON MoS2 NANOTUBES WITH NON-FERROUS TRIBOLOGICAL MATERIALS
MoS2 nanotubes (NTs) are novel lubricant additives reducing friction and wear of mechanical components made of steel. Nowadays, non-ferrous surfaces are becoming more widely used, mainly as multifunctional coatings worki...
Wpływ warunków eksploatacji na własności cieplne bezstykowego uszczelnienia czołowego
W pracy przedstawiono wyniki badań symulacyjnych dotyczących wpływu parametrów eksploatacyjnych na rozkłady temperatury w elementach konstrukcyjnych oraz w warstwie medium rozdzielającej pierścienie. Sformułowany model m...