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International Journal of Forming Processes
1292-7775
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 ARTICLE VOL 8/2-3 - 2005  - pp.271-289  - doi:10.3166/ijfp.8.271-289
TITLE
Effect of Anisotropic Plastic Flow on the Ductile Damage Evolution in Hydrobulging Test of Thin Sheet Metal

ABSTRACT
Simulating numerically any sheet metal forming process requires an accurate description of anisotropic material behaviour with damage. This paper describes the finite elements method (FEM) simulation results obtained using an elastoplastic model with a quadratic anisotropic yield function "strongly" coupled with an isotropic ductile damage and implemented into ABAQUS/Explicit. After a short presentation of the constitutive equations and their related numerical aspects, the determination and verification of the material constants through tensile tests conducted until the final fracture are discussed. Application have been made to the hydro-bulging test of a textured stainless steel sheet using a circular die. Attention is paid to the comparison between the predicted results with the recorded measures in term of bulge profiles, pole displacement versus bulge pressure and the crack initiation and growth during a hydro-bulging test. Adequacy was found between FEM simulations and experimental results showing how the coupled anisotropic elastoplastic model can accurately predict the ductile damage initiation and growth in sheet metal forming processes.


AUTEUR(S)
Mourad KHELIFA, Houssem BADREDDINE, Abdelaziz DAOUD, Mohamed Amen GAHBICH, Khémaïs SAANOUNI, Abdelhakim CHEROUAT, Abdelwaheb DOGUI

KEYWORDS
Anisotropic plasticity, mixed hardening, isotropic ductile damage, hydro-bulging, FEM simulation.

CITATIONS
ijfp.revuesonline.com/revues/5/citation/6894.html

LANGUE DE L'ARTICLE
Anglais

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