Paper Title:
Analysis of Forming Process of Automotive Aluminum Alloys Considering Formability and Springback
  Abstract

Formability and springback of the automotive aluminum alloy sheet, 6K21-T4, in the sheet forming process were numerically investigated utilizing the combined isotropic-kinematic hardening law based on the modified Chaboche model. To account for the anisotropic plastic behavior, the non-quadratic anisotropic yield stress potential, Yld2004-18p was considered. In order to characterize the mechanical properties, uni-axial tension tests were performed for the anisotropic yielding and hardening behavior, while uni-axial tension/compression tests were performed for the Bauschinger and transient behavior. The Erichsen test was carried out to partially obtain forming limit strains and FLD was also calculated based on the M-K theory to complete the FLD. The failure location during simulation was determined by comparing strains with FLD strains. For verification purposes, the automotive hood outer panel was stamped in real. After forming, the amount of draw-in, thinning and springback were measured and compared with numerical simulation results.

  Info
Periodical
Key Engineering Materials (Volumes 345-346)
Edited by
S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim
Pages
857-860
DOI
10.4028/www.scientific.net/KEM.345-346.857
Citation
W. O. Lee, D. Y. Kim, J. H. Kim, K. S. Chung, S. H. Hong, "Analysis of Forming Process of Automotive Aluminum Alloys Considering Formability and Springback ", Key Engineering Materials, Vols. 345-346, pp. 857-860, 2007
Online since
August 2007
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Price
$32.00
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