Monitoring the impact of tyre inflation pressure on tensile properties of forest tractors
M. Helexahttps://doi.org/10.17221/49/2013-RAECitation:Helexa M. (2014): Monitoring the impact of tyre inflation pressure on tensile properties of forest tractors. Res. Agr. Eng., 60: 127-133.
LKT 81 T forest tractor, manufactured byZŤS TEES, Martin (Slovak Republic) and widely used in Slovakia, was specifically chosen as the mechanised vehicle to be monitored. Tensile properties were examined using standard tensile tests, with a Tatra freight vehicle serving as the load vehicle. Actual measurements were performed on a concrete surface and on soil characterised as gravelly loam whose average moisture was 38%. The statistical methods used to verify the impact of significance from changes in tyre inflation pressure on selected tensile indicators were multi-factor analysis of variance (ANOVA) and Student’s t-test. Even though statistical analysis failed to directly confirm significance in the impact of changes of tyre inflation pressure on selected load indicators for a forest tractor fitted with standard tyres, positive changes can be discerned in measured dependencies. The article concludes with a discussion of the results obtained and their possible application in operational practice.
tractive power; tensile strength; forest soil; slippage; statistical analysis