The load diagram – the deflection gives first the elastic, then the plastic area of the load increase to the maximum point when the first crack appears.
Then – a sudden drop in the load in accordance with a decrease in the cross section of the bar, first very fast, then slowed down by the second development of the crack, then again the fall – further disclosure of the crack, etc. D. the formation of cracks in this diagram is opened very clearly. When considering this diagram, it should be noted that the scale of the abscissa (deflection) is very different in time due to a very intense increase in deflection with a decrease in the cross section of the sample. Disclosure of fractures of the break is cut. one after another is very figurative quickly. The idea of a large -scale multiplier can give a change in the load of the AR for a certain number of degrees of bending. The degrees of the bend are scheduled for the diagram. The full destruction of the bar is characteristic of a very later. With a deflection angle of 80 °, the bar is not yet destroyed, but hangs on a very thin pry. The load diagram – the deflection is highly dependent on the temperature; At high temperatures, the concentration of stresses is small, the plastic bend is obtained and the load is reduced after its maximum due to the development of plastic deformations by a smooth curve; When the temperature decreases, breakdowns appear and the completeness of the diagram decreases.
Frame houses are not amenable to deformation, so they are popular among the population. This is a great option for a summer residence, but not only. The frame house is a good housing, reliable, environmentally friendly and warm.
Thus, with a decrease in temperature, the destruction becomes more fragile.
A similar test is the test of cutting samples into eccentric stretching, recommended prof. N. P. Shchapov. Samples are offered two births: a C-shaped type with a washable cut and a rectangular-looking cut with a long back to the sample axis. Samples made of sheet steel, flat, without surfacing. The results of the study largely depend on the form of the samples, and therefore samples should be strictly defined sizes.