Abstract
We propose a method for the evaluation of the theoretical strength of metal under the conditions of tension and shear. The first of these strengths is determined by comparing the strain energy at the time of fracture with the energy losses required for evaporation. The second strength (obtained on the basis of the data of observations of Luders lines with the help of an electron microscope; × 5000) is found by comparing the strain energy with the energy spent for melting of the metal. The proposed computational formulas do not require additional assumptions about the ultimate strains. We computed the theoretical strength for aluminum, iron, copper, nickel, lead, and zinc. We also experimentally determined the actual strength of 65G steel and its ultimate strain, which coincides with the theoretical value.
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