RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Finite element simulation of earing defect in deep drawing

Auteur(s) / Author(s)

Saxena Ravindra K. (1) ; Dixit P. M. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Mechanical Engineering, Indian Institute of Technology, 208016, Kanpur, India

Résumé / Abstract

Deep drawing is an extensively used press working process since it eliminates expensive machining and welding operations and enables the production of components at a very high rate. The workpiece material used in a deep drawing process is anisotropic in nature, due to a prior thermomechanical treatment. Earing is one of the major defects observed in a deep drawing process due to the anisotropic nature of the sheet material. Knowledge about the ear formation in deep drawing allows a prior modification of the process, which can result in a defect-free final product with financial savings. In this paper, a recently proposed anisotropic yield criteria by Barlat et al. for rolled sheets is used to model the anisotropy for simulating the earing defect in square and circular cup drawing processes. The effect of the tooling geometry and process parameters on the ear formation is studied. It is shown that, in the square cup, the uneven metal flow rate, rather than the material anisotropy, is mainly responsible for the flange earing. Finite element formulation, based on the updated Lagrangian approach, is employed for the analysis. The stresses are updated in a material frame and the logarithmic strain measure is used, which allows the use of a large increment size. Isotropic hardening is assumed, and it follows a power law. Inertia forces are neglected due to small accelerations. The modified Newton-Raphson iterative technique is used to solve the nonlinear incremental equations.

Revue / Journal Title

International journal, advanced manufacturing technology    ISSN  1433-3015 

Source / Source

2009, vol. 45, no3-4, pp. 219-233 [15 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (19?) (Revue)

Mots-clés d'auteur / Author Keywords

Deep drawing

;

Earing

;

Elasto-plastic analysis

;

Finite element method

;

Localisation / Location

35400060333268.0007

Springer-Verlag London Limited, 2009
Nº notice refdoc (ud4) : 21954010



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas