Titre du document / Document title

Modeling Stress Strain Curves for Nonlinear Analysis

Auteur(s) / Author(s)

HUSHENG GAO ;

Résumé / Abstract

Methods of modeling stress strain curves for nonlinear stress analysis are discussed in order to obtain comparable results between different finite element analysts and between different versions of designs. The most common method for modeling stress strain curves is to use Ramberg-Osgood equation. For materials with significant discontinuous yielding, Ramburg-Osgood approximation leads to some problems near discontinuous yielding point. Discontinuous yielding occurs when sudden onset of plastic deformation associated Luders band takes place in a uniform test sample. For engineering structures and machine components, the propagation of Luders band may not occur in deformation process because of non-uniform stress distribution caused by stress concentration, complicated loading condition etc. A modified Ramberg-Osgood method for modeling stress strain curve is proposed.

Revue / Journal Title

Materials science forum    ISSN  0255-5476   CODEN MSFOEP 

Source / Source

2008, vol. 575-78 (1), pp. 539-544 [6 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Trans Tech, Stafa-Zurich, SUISSE  (1984) (Revue)

Mots-clés d'auteur / Author Keywords

stress

;

strain

;

nonlinear analysis

;

modeling

;

Ramberg-Osgood relation

;

Localisation / Location

INIST-CNRS, Cote INIST : 21741, 35400016177793.0890