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sample or compared part difficult. That is why the values of
liquid limit and the boundary of the
material increase, while dramatically
decreasing its ductility characteristics.
Schematic diagram stretch of the
same material under static (line 1) and
shock (line 2) loads are shown in fig.
7.7. However, considering the
proximity of the formulas (7.14) -
(7.16), the calculation of strength on
impact is made by using static
strength characteristics of the
Figure 7.7 material.
Reduced plasticity of the
material on impact often leads to the
fact that the material that undergoes during static destruction of
large plastic deformations destroys as fragile on impact. To
identify the susceptibility of the material to brittle fracture on
impact shock test is performed by means of which we can define
the so-called toughness of the material, which is characterized by
its ability to absorb mechanical energy on impact. To test samples
the standard form is used. One type of these samples is shown in
fig. 7.8.
The sample is subjected to shock destruction copra
pendulum type (fig. 7.9)

Figure 7.8 Sample
Figure 7.9

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