Unveiling ice friction and aerodynamic drag at the initial stage of sliding on ice: Faster sliding in winter sports

Irbe, Martins; Gross, Kārlis Agris; Vība, Jānis; Cerpinska, Marina

doi:10.1016/j.triboint.2021.106967

Cited by 11 publications

(9 citation statements)

References 20 publications

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“…Therefore, we define µ x as a fixed value to make the following results of this paper easier to reproduce and not dependent on an undisclosed parameter µ x := 0.004. (32) This value lies in the range of our simulated data and is in good agreement with the real life experiments from Poirier et al [8] and Irbe et al [10].…”

Section: Longitudinal Friction Modelsupporting

confidence: 91%

“…They performed friction experiments in an ice house as well (µ x = 4.2 • 10 −3 ) [9]. Irbe et al [10] performed tests with a skeleton at the start ramp of a track (µ x = 4.3 − 6.72 • 10 −3 ). Lozowski et al [11] developed a numerical model for longitudinal friction of a bobsled runner and compared different runner geometries on a flat surface and determined µ x ≈ 4.6 − 4.8 • 10 −3 for rocker radii (i.e.…”

Section: Related Work 1longitudinal Frictionmentioning

confidence: 99%

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Modeling Ice Friction for Vehicle Dynamics of a Bobsled with Application in Driver Evaluation and Driving Simulation

von Schleinitz,

Wörle,

Graf

et al. 2021

Preprint

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We provide an ice friction model for vehicle dynamics of a two-man bobsled which can be used for driver evaluation and in a driver-in-the-loop simulator. Longitudinal friction is modeled by combining experimental results with finite element simulations to yield a correlation between contact pressure and friction. To model lateral friction, we collect data from 44 bobsleigh runs using special sensors. Non-linear regression is used to fit a bob-specific one-track vehicle dynamics model to the data. It is applied in driving simulation and enables a novel method for bob driver evaluation. Bob drivers with various levels of experience are investigated. It shows that a similar performance of the top drivers results from different driving styles.

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Section: Longitudinal Friction Modelsupporting

confidence: 91%

Section: Related Work 1longitudinal Frictionmentioning

confidence: 99%

Modeling Ice Friction for Vehicle Dynamics of a Bobsled with Application in Driver Evaluation and Driving Simulation

von Schleinitz,

Wörle,

Graf

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Du et al [12] believed that the holding of the Winter Olympic Games would inevitably require the improvement of scientific and technological levels to overcome the regional restrictions gradually, establish more indoor skating rinks, ski resorts, etc., in the south, improve the participation of the southern winter sports, thus increasing the way of winter sports activities for the people of our country and promoting the health level of the people of the country. Irbe et al [13] explored the innovation points and path of winter sports development, adjusted the industrial structure, and re-realised the green, coordinated and sustainable development of mass winter sports. Promote winter sports in scenic spots, shopping malls and communities, and vigorously support figure skating, ice hockey, alpine skiing and other people to participate in leisure sports enthusiastically.…”

Section: Related Workmentioning

confidence: 99%

Model of Deep Information Environmental Factors on the Development of ICE and Snow Sports

Yongguo

Ying

et al. 2023

Ecological Chemistry and Engineering S

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Driven by national policies and international competitions, China’s winter sports and industry development will enter a new course. How to release the enormous potential skiing demand in China is significant to drive 300 million people to participate in winter sports and promote the development of China’s ice and snow industry, and defining the restrictive factors is a necessary prerequisite to realise the effective transformation of potential demand to actual growth power. Based on the in-depth information, this paper further analyses the influence of environmental factors on the development of winter sports. The research shows that the number of skiers about 20 times is the highest, up to 75.5 %, followed by the number of skiers about five times, up to 67.4 %. Then about ten times accounted for 48.6 %, and finally, about 15 times accounted for 37.6 %. This frequency can fully satisfy skiing enthusiasts to enjoy leisure activities, experience modern life fashion, use skiing to increase social opportunities, delight body and mind, and improve health. Based on the in-depth information, this paper reveals the shortcomings and existing environmental factors of China’s winter sports development. It provides a reference for the rational utilisation and development of ice and snow resources and the scientific and practical development of China’s winter sports.

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Section: Further Considerations On the Contact Areamentioning

confidence: 99%

“…This necessitates the importance of characterizing surface topography at the macroscale, microscale, and nanoscale and a consideration of measurement from the outermost surface to provide the contact area. All these contributing factors will influence the initial stick-slip phenomena at the initial stage of sliding and determine the speed at which ice-friction is reduced to the smallest value [44]. Further developments will benefit from providing a series of roughness parameter values, the contact area with slice depth, and a map of topographical features with more detailed characterization of the contact points.…”

Section: Further Considerations On the Contact Areamentioning

confidence: 99%

Surface Hierarchy: Macroscopic and Microscopic Design Elements for Improved Sliding on Ice

et al. 2021

Self Cite

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Frictional interaction with a surface will depend on the features and topography within the contact zone. Describing this interaction is particularly complex when considering ice friction, which needs to look at both the macroscopic and microscopic levels. Since Leonardo da Vinci shared his findings that roughness increases friction, emphasis has been placed on measuring surface coarseness, neglecting the contact area. Here, a profilometer was used to measure the contact area at different slicing depths and identify contact points. Metal blocks were polished to a curved surface to reduce the contact area; further reduced by milling 400 µm grooves or laser-micromachining grooves with widths of 50 µm, 100 µm, and 150 µm. Sliding speed was measured on an inclined ice track. Asperities from pileup reduced sliding speed, but a smaller contact area from grooves and a curved sliding surface increased sliding speed. An analysis of sliding speed versus contact area from incremental slicing depths showed that a larger asperity contact surface pointed to faster sliding, but an increase in the polished surface area reduced sliding. As such, analysis of the surface at different length scales has revealed different design elements—asperities, grooves, curved zones—to alter the sliding speed on ice.

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Unveiling ice friction and aerodynamic drag at the initial stage of sliding on ice: Faster sliding in winter sports

Cited by 11 publications

References 20 publications

Modeling Ice Friction for Vehicle Dynamics of a Bobsled with Application in Driver Evaluation and Driving Simulation

Modeling Ice Friction for Vehicle Dynamics of a Bobsled with Application in Driver Evaluation and Driving Simulation

Model of Deep Information Environmental Factors on the Development of ICE and Snow Sports

Surface Hierarchy: Macroscopic and Microscopic Design Elements for Improved Sliding on Ice

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