Corners in Plasticity - Koiter's Theory Revisited
Författare
Summary, in English
A general theory for plastic loading at corners is presented that includes Koiter's theory as a special case. This theory is derived within a thermodynamic framework and includes non-associated as well as associated theory. The non-associated theory even allows the number of potential functions to differ from the number of yield functions. The properties of the matrix of plastic moduli as well as of another important matrix are discussed in detail and hardening, perfect and softening plasticity are concisely defined. The existence of limit points is also discussed.
The strain driven format turns out to be the most general. Moreover, consistent loading and unloading criteria are established for general non-associated plasticity. An explicit criterion for uniqueness is derived, and finally, some of the general findings are illustrated by means of specific plasticity formulations often encountered in practice.
The strain driven format turns out to be the most general. Moreover, consistent loading and unloading criteria are established for general non-associated plasticity. An explicit criterion for uniqueness is derived, and finally, some of the general findings are illustrated by means of specific plasticity formulations often encountered in practice.
Avdelning/ar
Publiceringsår
1996
Språk
Engelska
Sidor
3697-3721
Publikation/Tidskrift/Serie
International Journal of Solids and Structures
Volym
33
Issue
25
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Mechanical Engineering
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 0020-7683