PLASTICITY OF METALS AT THE BY VOLUME TENSE STATE
DOI:
https://doi.org/10.20535/2305-9001.2012.64.44372Keywords:
diagram of plasticity, the third invariant of the stress tensor, indicator of stress, three-dimensional stress stateAbstract
The purpose of the real work is hypothesis check about uniform for various intense conditions to the chart of plasticity and development of ways of the accounting of influence of the volume scheme of a tension on plasticity. Design/methodology/approach. Methodology of construction of diagrams of plasticity is offered taking into account relative influence of the third invariant of tensor of tensions on plasticity. It is shown that the known diagrams of plasticity, reflecting dependence of the accumulated deformations to destruction from the dimensionless indexes of the tense state depend on the chart of the tense state, in particular from the third invariant of tensor or stress deviator. Its influence is offered to be considered in tension parameter.Influence of the third invariant of tensor of tensions on plasticity explains the fact " of anomalous" increase of plasticity in the conditions of biaxial and monaxonic tension. Findings. When studying technological processes of processing of metals by pressure where the volume tension is realized it is necessary to use the chart of the plasticity constructed taking into account the third invariant of a tensor of tension.
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