A Volumetric Constitutive Law for Snow Subjected to Large Strains and Strain Rates,

Abstract

A volumetric constitutive equation was developed to characterize the behavior of snow subjected to large compressive volumetric deformations. By treating the material as a suspension of air voids in a matrix material of polycrystalline ice, a rate-dependent volumetric constitutive law was formulated and found to accurately predict material response to pressure loads for a wide range of load rates. Comparison of the theory with shock wave data was not considered in this paper, although the constitutive law appears to be valid for such load situations. One application to oversnow mobility of tracked vehicles was made. In this case, power requirements due to snow compaction were calculated parametrically in terms of vehicle speed, track loading, and snow density.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1979
Accession Number
ADA075474

Entities

People

  • Robert L. Brown

Organizations

  • Cold Regions Research and Engineering Laboratory

Tags

DTIC Thesaurus Topics

  • Cold Regions
  • Compressive Properties
  • Constitutive Equations
  • Crystal Structure
  • Engineering
  • Hydrostatic Pressure
  • Materials
  • Mechanical Properties
  • Mechanics
  • Physical Properties
  • Polycrystals
  • Porosity
  • Porous Materials
  • Pressure Distribution
  • Strain Rate
  • Stresses
  • Tracked Vehicles

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Logistics and Supply Chain Management.
  • Mechanical Engineering/Mechanics of Materials.