@inproceedings{5b4f334ba003431690cb349592c63b52,
title = "An investigation of blank holding force in isothermal stamping of aluminium alloys",
abstract = "Wrinkling and fracture are the two important failure modes in hot stamping of aluminium alloy sheets. Control of the blank holding force (BHF) can eliminate these defects and improve the quality of formed parts. This paper presents the results of recent studies on the effects of blank holding force on the formability and wrinkling in hot stamping of rectangular parts. To simplify the problem, this work concentrates on isothermal stamping for an AA6082 aluminium alloy. A set of constitutive equations has been developed and calibrated by experimental data for AA6082 at different temperatures and strain rates. The calibrated constitutive equations were implemented in the commercial finite element code LS-DYNA via the user-defined material subroutine, UMAT A finite element forming process model was built for simulating hot stamping of a complex-shaped panel part to investigate the effect of BHF on the formability and wrinkling features. Further, forming process optimisation was carried out using the finite element model, with wrinkling and failure limits (the process window) identified for a model panel part The dependence of the BHF on temperature and sheet thickness were also identified.",
keywords = "Blank holding force, FE process modelling, Formability, Hot stamping, Wrinkling",
author = "M. Mohamed and J. Lin and D. Balint",
year = "2011",
month = sep,
language = "English",
isbn = "9783514007840",
series = "Proceedings of the 10th International Conference on Technology of Plasticity, ICTP 2011",
pages = "1051--1056",
booktitle = "Proceedings of the 10th International Conference on Technology of Plasticity, ICTP 2011",
note = "10th International Conference on Technology of Plasticity, ICTP 2011 ; Conference date: 25-09-2011 Through 30-09-2011",
}