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Title: Robust Springback Optimisation of DP600 Steels for U-Channel Forming
Authors: Bekar, Deniz
Acar, Erdem
Özer, Fırat
Güler, Mehmet Ali
Keywords: Dual phase steels
Monte Carlo simulations
robust optimisation
Issue Date: 2011
Publisher: Int Assoc Engineers-Iaeng
Source: World Congress on Engineering (WCE 2011) -- JUL 06-08, 2011 -- Imperial Coll, London, UNITED KINGDOM
Series/Report no.: Lecture Notes in Engineering and Computer Science
Abstract: Automobile companies have increased the use of high strength dual phase steels as an alternative to aluminium and magnesium alloys due to their light weight, low cost and durability. Due to their high tensile strength, however, dual phase steels have a tendency to springback more than other structural steels in a forming operation. In addition, variations in material properties and manufacturing process parameters cause springback variation over different manufactured parts. Therefore, it is an important task to reduce the magnitude of springback as well as its variation within to produce robust and cost-effective parts. This paper investigates minimization of the magnitude and variation of springback of DP600 steels in U-channel forming within a robust optimisation framework. The computational cost is reduced by utilizing metamodels for prediction of the springback and its variation during optimisation. Three different allowable sheet thinning levels are considered in solving robust optimisation problem and it is found that as the allowable thinning increases the die radius reduces thereby the magnitude and variation of springback reduces. Finally, a sensitivity analysis is performed and the yield stress is found to be the most important random variable.
ISBN: 978-988-19251-5-2
ISSN: 2078-0958
Appears in Collections:Makine Mühendisliği Bölümü / Department of Mechanical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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