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Séminaire LTDS (présentiel ECL) From Geometry to texture: A Multi-Scale Analysis of Ski–Snow Friction in Cross-Country Skiing, Andreas Almqvist, Luleå University of Technology, Sweden
Le 2 octobre 2025
Abstract: Cross-country skiing performance is strongly influenced by the resistive forces acting between skis and snow. Among these, ski–snow friction plays a decisive role, as it emerges from a complex interplay of material properties, ski geometry, base preparation, snow characteristics, and environmental conditions. This seminar presents recent advances in the multi-scale analysis of ski–snow friction carried out at the Ski & Snow Lab, Luleå University of Technology, within the Swedish Research Centre for Sports and Performance Technology (SPORTC). Combining field experiments with innovative tribometric methods, high-resolution surface characterisation, and numerical modelling, we demonstrate how macro-scale ski geometry and micro-scale ski-base textures interact to determine contact mechanics and frictional losses. Results from glide tests and RTK-GNSS–based tribometry are integrated with surface topography measurements and contact simulations, providing predictive insights into friction coefficients unde