Increased impact resistance of cross-country ski poles by improved, simulation assisted composite design
Paper in proceedings, 2018

High-end carbon fibre reinforced polymer (CFRP) ski poles of today are lighter and stiffer than previous generations, explained by the higher specific stiffness (stiffness to density ratio) for CFRPs in the range of 0.1-0.13 GPa m3/kg compared to approximately 0.03 GPa m3/kg for aluminium. In this study, we have analysed different CFRP pole designs on the market by mechanical testing and microscopy. We conclude that the strive for optimised weight and bending stiffness has generally driven the pole design to be sub-optimal towards stiffness making them unnecessarily sensitive to transverse and impact loads. Based on the experimental findings, we have developed numerical simulation models to predict the bending and stress state in CFRP ski poles under axial as well as transverse (impact) loading conditions. These numerical model has then been used to find a new conceptual pole design with similar weight and stiffness but with seemingly higher impact resistance.

failure

ski poles

numerical simulation

improved design

mechanical testing

stiffness

Author

Martin Granlund

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Gustav Gräsberg

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Hana Zrida

Chalmers, Industrial and Materials Science, Materials and manufacture

Martin Fagerström

Chalmers, Industrial and Materials Science, Material and Computational Mechanics

Andreas Karlsson

SKIGO

Proceedings

Subject Categories

Mechanical Engineering

Applied Mechanics

Composite Science and Engineering

Areas of Advance

Materials Science

More information

Latest update

12/14/2020