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Consequences of Dynamic Yield Surface in Viscoplasticity

In English

Författare

Summary, in English

A theory of viscoplasticity is formulated within a thermodynamic concept. The key point is the postulate of a dynamic yield surface, which allows us to take advantage of the postulate of maximum dissipation to derive an associated formulation of the evolutions laws for the internal variables without using penalty techniques that only hold in the limit it when viscoplasticity degenerates to inviscid plasticity. Even a non-associated formulation is presented. Within this general formulation, a particular format of the dynamic yield function enables us to derive the static yield function in a consistent manner. Hardening, perfect and softening viscoplasticity is also defined in a consistent manner. The approach even includes associated and non-associated viscoplasticity where corners exist on the yield and potential surfaces.

Avdelning/ar

Publiceringsår

2000

Språk

Engelska

Sidor

4601-4622

Publikation/Tidskrift/Serie

International Journal of Solids and Structures

Volym

37

Issue

33

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Ämne

  • Mechanical Engineering

Nyckelord

  • Flow-rule
  • Creep
  • Viscoplasticity
  • Thermodynamic of solids

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0020-7683