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At removal of curves of kinetics formations it is necessary to take correctly you tension size as at a big tension in an elm the lump a body arises a high speed of deformation which can be taken for instant elastic deformation mistakenly.

Structural and mechanical properties of fish are shown under the influence of normal or tangent tension. The behavior of a body of fish in a tension is defined by these properties. Under the influence of the applied force the body of fish is formed.

As in the indicator there is a spring interfering movement of a rod the characteristic of a spring, and the effort necessary for compression of a spring was removed, was considered at determination of tension between a tip and a rod. Fluctuation of tension did not exceed 6%.

From the provided data on rigidity of a body of different types of fishes for which work was defined at 5-millimetric deformation without recalculation, the greatest rigidity the body of a jack mackerel possesses. Big rigidity of a body of a sprat and the capelin, is caused by deformation not only muscular tissue, but also a spine bone, and consequently, increase of resistance compression) and compression works.

Muscular tissue of fish on structural and mechanical properties is intermediate between liquid and solid bodies and represents, apparently, disperse system with continuous structure. Considering muscular tissue of fish as continuous structure, it is not necessary to consider it uniform.

There is a method based on use of a universal konsistometr by means of which define elasticity, the hardness and viscosity of the studied object. I. A. Voskresensky offered three indicators for the characteristic of structural and mechanical properties of muscular tissue of fish: elasticity, elastichesky and plastic durability. Elasticity is understood as ability of muscular tissue of fish to restore the initial geometrical sizes after removal of the deforming force. Elastichesky durability is characterized by ability of muscular tissue of fish to counteract the movement of the stupid body compressing fabric under the influence of the deforming force.

For the mathematical description of deformations and tension of the studied body it is possible to pick up at first according to experimental data the suitable model consisting of elastic, viscous and plastic elements or their combinations and then to describe it mathematically. Or at once under to take equation type, since the elementary types which qualitatively describes experimental dependence. High-quality coincidence is found on existence or lack of instant elastic deformation, the late deformation, residual deformation and a relaxation of tension.

Apparently, designers of the fish-processing equipment will also be able to guarantee its reliable work on raw materials which quality is in the certain limits set by means of criterion of rigidity.

The solution of the differential equation contains, any constants which number is equal to an order of the differential equation. Any constants define, proceeding from entry conditions, i.e. at t = 0 or at t = ∞. The number of conditions has to equal to number of any constants. As the mechanical behavior of a real body is described by the equation (only approximately, the task consists in choosing the private type of the equation which is rather well describing experimental dependence - tension — deformation — time.

Dependence between deformation of a body of fish and tension in it characterizes mechanical behavior of a body of fish. The size of deformation of a body of fish under the influence of the applied force is caused first of all by its structural and mechanical properties.