Structure of constitutive equations in plasticity for different choices of state and control variables

✍ Scribed by M. Klisinski; Z. Mroz; K. Runesson

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 904 KB
• Volume: 8
• Category: Article
• ISSN: 0749-6419
• DOI: 10.1016/0749-6419(92)90049-i

✦ Synopsis

The structure of incremental equations in plasticity is discussed with respect to the choice of control variables representing stress, strain or mixed control, while (quite independently) the yield surface may be represented in either stress, strain, or mixed space. It is concluded that the choice of state variables does not affect the analytical properties of the resulting equations, whereas the choice of control variables has a major influence on the uniqueness of the stress-strain behaviour. For an associated flow rule the most and least severe restrictions are placed by pure stress control and pure strain control, respectively.