Open AccessInvestigation of friction hysteresis using a laboratory-scale tribometer
Author(s) -
Patric Daniel Neis,
Patrick De Baets,
Yeczain Pérez Delgado,
Ney Francisco Ferreira
Publication year - 2011
Publication title -
sustainable construction and design
Language(s) - English
Resource type - Journals
eISSN - 2295-9092
pISSN - 2032-7471
DOI - 10.21825/scad.v2i1.20441
Subject(s) - tribometer , sine wave , hysteresis , brake , acceleration , materials science , mechanics , acoustics , engineering , physics , tribology , composite material , classical mechanics , voltage , metallurgy , electrical engineering , quantum mechanics
The 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 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.