Stability of the Low-cycle Deformation of Structures

The need to analyze the stability of low-cycle processes of deformation is stimulated by the transition from strength criteria in terms of allowable stresses to the analysis of limit states of structures and risk criteria. It is proposed to separate the solution of this problem for the four main types of a low-cycle deformation. The deformation properties of the material are qualitatively different to those process types. This leads to qualitative and quantitative differences in both the unstable processes and their consequences. Possibilities and methods of the analysis and those providing a desired durability of structures also become different.