Ski Loading and Flexure on a Groomed Snow Surface

  • David A. Lind
  • Scott P. Sanders


The American Society of Testing and Materials (ASTM) defines the bending stiffness of a ski by its deflection under a given load placed on the ski at its midpoint when the ski is supported at its tip and tail contact points. For a casual comparison of ski flexure values, the values obtained in this manner may be adequate. To determine a ski’s loading distribution and flexure in a real snow bed, we need to consider the distribution of the ski’s bending stiffness, which may be described by the relationships associated with the mechanics of a nonuniform beam in flexure [1]. A similar set of relations applies for analyzing the torsional stiffness of a ski; however, in this discussion we consider coupled bending and torsional deflections only qualitatively. We address the specific problem of predicting the edge loading on a ski when it bends to contact the packed and groomed surface of an alpine ski slope.


Neutral Axis Torsional Stiffness Beam Deflection Initial Camber Shear Force Versus 
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  1. 1.
    For a useful discussion of the mechanics of beams in flexure and torsion, see S. Timoshenko and J. N. Goodier, Theory of Elasticity, 2nd ed. (McGraw-Hill, New York, 1951), pp. 70–73.zbMATHGoogle Scholar

Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • David A. Lind
    • 1
  • Scott P. Sanders
    • 2
  1. 1.University of ColoradoBoulderUSA
  2. 2.University of New MexicoAlbuquerqueUSA

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