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Determination of the indirect physical and mechanical characteristics of sea ice – ulmate strength in bending

DOI: 10.17586/1606-4313-2021-20-3-81-89
UDC 539. 2/6; 629.5

Determination of the indirect physical and mechanical characteristics of sea ice – ulmate strength in bending

Veprinyak Ivan A., Koshkin Sergey V.

For citation: Veprinyak I.A., Koshkin S.V. Determination of the indirect physical and mechanical characteristics of sea ice – ulmate strength in bending. Journal of International Academy of Refrigeration. 2021. No 3. p. 81-89. DOI: 10.17586/1606-4313-2021-20-3-81-89

Abstract
A method is proposed for determining the indirect characteristic for the strength of drifting sea ice - the ultimate strength of ice in bending. The results of field experiments on the destruction of consoles cut out on fields of ice are generalized. The approximating dependences are based on the structural model for the strength of sea ice as a porous body. The change in the tensile strength parameter – the volumetric content of brine, is considered in two ranges corresponding to a small and large pore volume in a cellular structure. The second parameter, the ultimate strength of fresh ice in bending, is considered and determined separately. It is shown how this characteristic of fresh ice is numerically related to its average temperature and structure (the latter – through the score of ice destruction). The presentation of the method is accompanied by a constant analysis of the results. Numerical comparison of determining the ultimate strength of ice in bending shows that it is in good agreement with experimental data and covers the entire area of determining this indirect characteristic of ice. The conclusions give the reasons for the conventionality of the ultimate strength of ice in bending as a strength characteristic. In conclusion, another criterion for the strength of ice as an elastic-plastic and fragile body is proposed.

Keywords: ultimate strength in bending, sea drifting ice, structural strength model, brine content, ice temperature, fresh ice

All references

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