Oriented damage in ductile sheets: Constitutive modeling and numerical integration
Artikel i vetenskaplig tidskrift, 2007

Thermodynamics with internal variables provides a framework for constitutive modeling of elasto-plastic deformations. Within the scope of the theory, constitutive and evolution equations for ductile, elasto-plastic materials with mixed (isotropic and kinematic) hardening and anisotropic damage have been developed. Postulates within continuum damage mechanics were used in order to incorporate damage as an internal variable. Owing to this, and to a simplified definition of the inverted damage effect tensor, a general expression for degradation of the elastic properties in materials has been obtained. The corresponding numerical algorithm for integration of the constitutive equations is based on an elastic predictor - plastic/ damage corrector procedure. The plastic/damage corrector is uncoupled, which further simplifies and expedites the corrector procedure.

MECHANICS

constitutive modeling

large strain plasticity

PLASTICITY

mixed hardening

HARDENING RULES

small strain elasticity

anisotropic damage

RUPTURE

numerical integration

ANISOTROPIC THEORY

Författare

Edin Omerspahic

Chalmers, Tillämpad mekanik

Kjell Mattiasson

Chalmers, Tillämpad mekanik, Material- och beräkningsmekanik

International Journal of Damage Mechanics

1056-7895 (ISSN) 1530-7921 (eISSN)

Vol. 16 1 35-56

Ämneskategorier

Maskinteknik

DOI

10.1177/1056789507060776