Влияние Гидростатического Давления И Истории Его Изменения На Пластичность В Задачах Обработки Металлов Давлением

The results of studies of plasticity of metals at volumetric stress state are presented. Experimental data on the effect of hydrostatic pressure and its changes in the plasticity of metals are processed. The effect of the invariants of the stress tensor on the plasticity is shown. Here the process of samples loading is considered in the space of three dimensionless invariant characteristics of the stress-strain state. It is shown that the plasticity is affected by the first and second derivative of the indicators of stress state. It is also shown that the defor-mability criteria based on the linear theory of damage accumulation provide a significant deviation between the calculated and experimental results.