Deakin University
Browse

File(s) under permanent embargo

Influence of initial back stress on the earing prediction of drawn cups for planar anisotropic aluminum sheets

Version 2 2024-06-03, 17:07
Version 1 2017-05-17, 13:47
journal contribution
posted on 2024-06-03, 17:07 authored by Jeong YoonJeong Yoon, F Barlat, K Chung, F Pourboghrat, DY Yang
Anisotropy is closely related to the formability of sheet metal and should be considered carefully for more realistic analysis of actual sheet metal forming operations. In order to better describe anisotropic plastic properties of aluminum alloy sheets, a planar anisotropic yield function which accounts for the anisotropy of uniaxial yield stresses and strain rate ratios simultaneously was proposed recently. This yield function was used in the finite element simulations of cup drawing tests for an aluminum alloy 2008-T4. Isotropic hardening with a fixed initial back stress based on experimental tensile and compressive test results was assumed in the simulation. The computation results were in very good agreement with the experimental results. It was shown that the initial back stress as well as the yield surface shape have a large influence on the prediction of the cup height profile.

History

Journal

Journal of materials processing technology

Volume

80-81

Pagination

433-437

Location

Amsterdam, The Netherlands

ISSN

0924-0136

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

1998, Elsevier Science S.A.

Publisher

Elsevier