The true yield stress of metals and methods
of its determination
A.M. Grekov, M.B. Berersnev
Vjatska State Technical University, Kirov, Russia
Change of true yield stress at tensionand compression has been considered. Some methodic of determination of true yield stress taking into consideration the influence of contract force of friction on the changing of stressed state scheme have been suggested. Some experimental data on efficiency of different lubricants at plastic compression deformation have been given.