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Contact angels on the running surface of cross-country skis
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik, fysik och matematik.
Mittuniversitetet, Fakulteten för naturvetenskap, teknik och medier, Institutionen för teknik, fysik och matematik.
Ansvarlig organisasjon
2005 (engelsk)Inngår i: The Impact of Technology on Sport / [ed] Subic, A & Ujihashi, S, Melbourne: Australasian Sports Technology Alliance Pty Ltd , 2005, s. 318-323Kapittel i bok, del av antologi (Annet vitenskapelig)
Abstract [en]

The importance of high hydrophobicity for minimising snow-ski friction has been discussed in a number of scientific papers. The chemical modification of surface forces using fluoropolymeric coatings can result in water contact angles of up to 120°, but not more. To reach extreme values of the contact angle, a second factor has to be modified, namely surface structure. In this study a number of cross-country skis were treated with a modern method of stone grinding and with old-fashioned steel scraping. The surface roughness (3D) and the surface (solid-liquid) contact angle were then measured. After this, the skis were treated with a hot glide wax and new measurements were made. This study also examines the contact angles (solid-liquid) of the flowed surface of a sample of glide wax and the surface of a sample of solid press-sintered running base (UHMWPE). Unexpectedly low hydrophobicity was observed after stone grinding.

sted, utgiver, år, opplag, sider
Melbourne: Australasian Sports Technology Alliance Pty Ltd , 2005. s. 318-323
Emneord [en]
roughness, Sport, Idrott
HSV kategori
Identifikatorer
URN: urn:nbn:se:miun:diva-3902Lokal ID: 3088ISBN: 0-646-45025-5 (tryckt)OAI: oai:DiVA.org:miun-3902DiVA, id: diva2:28934
Tilgjengelig fra: 2008-11-29 Laget: 2008-11-28 Sist oppdatert: 2010-05-17bibliografisk kontrollert
Inngår i avhandling
1. Interfacial kinetic ski friction
Åpne denne publikasjonen i ny fane eller vindu >>Interfacial kinetic ski friction
2010 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

It is no doubt, that the ski glide over the snow is a very complicated object of

research. However, ski glide is just a one area of many other areas of human

knowledge. As a rule, the scientists and practitioners, who work in these areas,

operate with some publicly expressed more or less solid hypotheses. These

researchers work with one hypothesis until another and a better one comes up.

Our literature studies and our own observations regarding modern skis

preparations, did not give us any solid hypotheses, which are able to explain the

actual form and content of this procedure. The present work is an attempt to reveal

such hypotheses.

Conclusion: To achieve an optimal glide on skis with the base (the ski sole)

made of some high hydrophobic durable polymer, e.g. UHMWPE, PTFE; we only

have to create an adequate topography (texture) on the ski running surface,

adequate to the actual snow conditions.

 

sted, utgiver, år, opplag, sider
Östersund: Mittuniversitetet, 2010. s. 40
Serie
Mid Sweden University doctoral thesis, ISSN 1652-893X ; 88
Emneord
ski glide, ski base, ski wax, hydrophobicity, UHMWPE, PTFE, topography
HSV kategori
Identifikatorer
urn:nbn:se:miun:diva-11525 (URN)978-91-86073-79-4 (ISBN)
Disputas
2010-06-15, F234, Campus Östersund, Östersund, 10:15 (svensk)
Opponent
Veileder
Tilgjengelig fra: 2010-05-17 Laget: 2010-05-17 Sist oppdatert: 2010-05-17bibliografisk kontrollert

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