In the article the relationships are determined between elastic-and-strained state of material, change of form and hardening of surface layer in the process of machining of metallic surface by instrument with flexible working elements. The results of tests are presented, which showed that the effect of hardening and the resistance to fatigue are rather high.
The authors have proposed rather simple differential method of calculating the coefficient of shove depending on the moving speed of railway carriage and the ratio of inflexibility of its wheel suspension.
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