The authors of this technical paper use the modified Cam-clay model and the classic Drucker-Prager plasticity model to numerically represent snow. The purpose of this numerical representation is the optimization of the traction behavior of ground vehicles on snow-covered road surfaces by means of numerical simulations. Both models are recast within an algorithmic framework for multiplicative finite deformation plasticity. A fully implicit return project algorithm for the Cam-clay model in combination with a modified elastic stress-strain law and the calculation of the exact algorithmic tangent moduli provide an efficient application of this model. Both models are calibrated according to the experimental data obtained from hydrostatic and shear-box tests of snow and verified by reanalyses of these tests. Numerical results derived from finite-element analyses of the mechanical interaction between a single tread rubber block from an automobile tire moving over a snow-covered surface are presented.


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  • Accession Number: 00728779
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Nov 30 1996 12:00AM