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 68
- Downloads 0
THE ANALYSIS OF THE INFLUENCE OF GAMMA IRRIADIATED POLYSULFONES ON THE STATIC FRICTION COEFFICIENT
The paper presents the results of studies on the effects of gamma irradiation on the static friction coefficient of thermoplastic polymer – polysulfone. These polar polymers belong to the group of amorphous thermoplastic...
THE INFLUENCE OF SURFACES FLUORINATION ON TRIBOLOGICAL PROPERTIES OF RUBBER
In this paper, the influence of surface fluorination acrylic rubber (ACM), butadiene – acrylonitrile rubber (NBR) and its hydrogenated analogue (HNBR) on their tribological properties and resistance to ageing in contact...
Wpływ rodzaju zagęszczacza w kompozycji smar plastyczny-napełniacz na efektywność smarowania
Przedstawiono badania wpływu rodzaju zagęszczacza w smarze plastycznym, który zmodyfikowano (napełniono) smarem stałym, na efektywność smarowania stalowych węzłów ślizgowych pracujących w obszarze tarcia mieszanego. W wy...
FATIGUE STRENGTH IMPROVEMENT OF STEEL ROLLERS IN CONVEYOR BELTS WHEN USING SHOT PEENING
Numerous factors influence the tribological wear of steel rollers used in conveyor belts. The difficulty in precise determination of these factors results from, among others, a complex and not completely explored wear me...
THE EFFECT OF HELICAL GROOVE PRESENCE ON THE TRIBOLOGICAL PERFORMANCE OF JOURNAL BEARINGS
The hydrodynamic bearings could suffer critical damages operating in contaminated environments that cause machine breakdown. In such hard operating conditions, hydrodynamic bearings with grooved journals are less sensiti...