METHOD FOR DETERMINING SPECIFIC ENERGY OF MECHANICAL ICE DESTRUCTION Russian patent published in 2018 - IPC G01N3/08 

FIELD: measuring equipment.

SUBSTANCE: sample is manufactured in the form of an axisymmetric body with parallel upper plane and base and perpendicular lateral walls, its placement between the plates of the testing machine, loading by moving the upper plate at a constant speed, fixing the limiting values of its elastic deformation and, corresponding to the limiting elastic contact force, with determination of the specific energy of mechanical destruction as their product, referred to the value of mass of the whole sample. A sample made of ice is used, with the possibility of localization of fractures on the upper portion of sample, using a sample whose smallest base is 1.12-2 times larger than the smallest size of the upper plane, and the sample height is 2.5-4.0 of the smallest size of its base. The moving speed of movable plate corresponds to the drift velocity of ice field. Density of ice is determined and limiting changes in the height of fractured part of ice sample and the limiting contact force are continuously recorded. The specific fracture energy is calculated as the integral area of that portion of changes graph of parameters such as the limit value of sample elastic deformation and the corresponding limit value of elastic contact force recorded during the test, which describe the fracture process only in the part of the sample to be destroyed, or the specific fracture energy is calculated according to the formula.

EFFECT: ability to obtain reliable results in laboratory conditions of determining the energy characteristics of ice destruction, required for the design of transport hydraulic structures, and structures on the shelf of freezing seas.

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