An approach to elastic shakedown based on the maximum plastic dissipation theorem
- Autori: Polizzotto C.; Borino G.; Fuschi P.
- Anno di pubblicazione: 2000
- Tipologia: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/511970
Abstract
ELASTIC-PERFECTLY PLASTIC SOLID STRUCTURES are considered subjected to combined loads, superposition of permanent (mechanical) loads and cyclically variable loads, the latter being specified to within a scalar multiplier. The classical maximum dissipation theorem is used to derive known results of the shakedown theory, as well as a few apparently novel concepts: the shakedown limit load associated with a given (noninstantaneous) collapse mode, the mixed upper bound to the shakedown safety factor, and the mixed static-kinematic formulation of the shakedown safety factor problem. The shakedown load boundary surface is also investigated and a number of its notable features are pointed out. A simple illustrative example is presented.