Articles

Investigation of friction hysteresis using a laboratory-scale tribometer

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Abstract

The current paper addresses the characterization of dynamic friction by using a laboratory-scale
tribometer. A special post-processing script in MatLab has been developed in order to analyse the data
from the experiments. A sine wave signal for the velocity is imposed, with three different frequencies and,
consequently, acceleration and deceleration rates. A friction material from brakes, with nominal contact
area of 254 mm², was subjected to sliding against a commercially available brake disc (gray cast iron, diameter of 256 mm). Some technical details and adjustments from the designed tribometer are showed and the results from the experiments are discussed. A friction hysteresis has been observed for all experimental curves, which exhibit loops in elliptical shape. A negative slope has been encoThe current paper addresses the characterization of dynamic friction by using a laboratory-scaletribometer. A special post-processing script in MatLab has been developed in order to analyse the datafrom the experiments. A sine wave signal for the velocity is imposed, with three different frequencies and,consequently, acceleration and deceleration rates. A friction material from brakes, with nominal contactarea of 254 mm², was subjected to sliding against a commercially available brake disc (gray cast iron,diameter of 256 mm). Some technical details and adjustments from the designed tribometer are showedand the results from the experiments are discussed. A friction hysteresis has been observed for allexperimental curves, which exhibit loops in elliptical shape. A negative slope has been encountered for thecurves when the imposed frequency is 1 Hz and 2 Hz, while for the highest frequency (4 Hz) the slope ispositive. The laboratory-scale tribometer, associated to the post-processing stage, is capable tosuccessfully be used to characterize friction hysteresis effect. untered for the curves when the imposed frequency is 1 Hz and 2 Hz, while for the highest frequency (4 Hz) the slope is positive. The laboratory-scale tribometer, associated to the post-processing stage, is capable to successfully be used to characterize friction hysteresis effect. 

How to Cite:

Neis, P., De Baets, P., Perez Delgado, Y. & Ferreira, N., (2011) “Investigation of friction hysteresis using a laboratory-scale tribometer”, International Journal of Sustainable Construction and Design 2(1), 92-98. doi: https://doi.org/10.21825/scad.v2i1.20441