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Publikācija: Measurement of Sliding Velocity on Ice

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Nosaukums oriģinālvalodā Measurement of Sliding Velocity on Ice, as a Function of Temperature, Runner Load and Roughness, in a Skeleton Push-Start Facility
Pētniecības nozare 2. Inženierzinātnes un tehnoloģijas
Pētniecības apakšnozare 2.5. Materiālzinātne
Autori Ernests Jansons
Jānis Lungevičs
Klāvs Stiprais
Liene Plūduma
Kārlis-Agris Gross
Atslēgas vārdi Ice friction; Sliding speed; Coefficient of friction; Test method; Lubrication
Anotācija The sliding velocity on ice, as opposed to coefficient of friction measurements, is proposed to show the effect of experimental conditions on the sliding velocity. A sled was positioned with one runner in a groove and the other on flat ice and then released to slide 25 m down an ice track. The sliding velocity was calculated from 20 repeat experiments using runners with a different roughness (polished vs abraded) under different loads (30 kg, 40 kg and 50 kg) and at a range of air temperatures (−15 °C, −10 °C, −2 °C, 0 °C and 2 °C). The error in sliding velocity was sufficiently small (0.15%) to clearly show the effect of different parameters, and allowed trends to be identified. Sliding velocity was mostly influenced by a change in temperature, then by a change in load, and then the runner roughness. The highest speed was recorded at 0 °C, when the roughness and intermediate loads played a larger effect on the sliding velocity. The results are discussed in reference to solid friction, movement over a water film, and the mechanical properties of the ice. Measuring the sliding velocity, with a controlled release mechanism on the sled obviates the operated related error, and also provides a good insight on the influence of different conditions, instead of measuring the ice friction and making predictions of the acceleration and the resulting sliding velocity.
DOI: 10.1016/j.coldregions.2018.03.015
Hipersaite: https://www.sciencedirect.com/science/article/pii/S0165232X17303026?via%3Dihub 
Atsauce Jansons, E., Lungevičs, J., Stiprais, K., Plūduma, L., Gross, K. Measurement of Sliding Velocity on Ice, as a Function of Temperature, Runner Load and Roughness, in a Skeleton Push-Start Facility. Cold Regions Science and Technology, 2018, Vol.151, 260.-266.lpp. ISSN 0165-232X. Pieejams: doi:10.1016/j.coldregions.2018.03.015
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