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2 results

  • Tensile strain and fracture of snow

  • Zempachi Watanabe
  • Journal:
    Journal of Glaciology / Volume 26 / Issue 94 / 1980
    Published online by Cambridge University Press:
    20 January 2017, pp. 255-262
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  • Measurements over several hours of the tensile strain of snow have been carried out, and the strain-rate e can be expressed in terms of stress σ, elapsed time t, and (Celsius) snow temperature T as . It is evident from this expression that a creep fracture does not happen without either an increase of stress or a rise of temperature. We observed the phenomenon of creep fracture of snow by these two methods.

  • Proposition of a net-like model of snow

  • Zempachi Watanabe
  • Journal:
    Annals of Glaciology / Volume 18 / 1993
    Published online by Cambridge University Press:
    20 January 2017, pp. 72-78
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  • Thin-section photographs show that snow consists of lumpy parts and connecting branches. The model proposed here agrees with this real state. This new model is derived from four packing forms of isometric spheres by shrinking the original spheres while maintaining and connecting points of contact as a column. The texture of the model can be varied by setting the packing form, the shrinking ratio and the thickness of connecting branches. When the density and strength of the material of the model are set to the values of polycrystalline ice, the model density and tensile strength agree with published data for dry compacted snow.