Dedicated linear – Voce model and its application in investigating temperature and strain rate effects on sheet formability of aluminum alloys |
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| Affiliation: | 1. Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, PR China;2. School of Mechanical, Electrical and Information Engineering, Shandong University, Weihai 264209, PR China;3. Université Européenne de Bretagne, INSA-LGCGM – EA 3913 20, avenue des Buttes de Coësmes, 35043 RENNES Cédex, France;1. Institut Jean Le Rond d’Alembert, UMR 7190 CNRS, Université Pierre et Marie Curie, 4 place Jussieu, F75005 Paris, France;2. Laboratoire Modlisation et Simulation Multi Echelles, UMR 8208 CNRS, Université Paris-Est, 5, boulevard Descartes, F77454 Marne la Vallée, France;3. Laboratoire de Mécanique de Lille, UMR 8107 CNRS, Université de Lille 1, Cité scientifique, F59655 Villeneuve d’Ascq, France;1. School of Aerospace Engineering, Tsinghua University, Beijing, China;2. China Academy of Space Technology, Beijing, China;3. Institute of General Mechanics, RWTH Aachen University, Germany |
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| Abstract: | This paper proposes a method to investigate the effects of temperature and strain rate on the forming limit curves (FLCs) by combining a modified Voce constitutive model (Lin-Voce model) with the numerical simulation of Marciniak test. The tensile tests are firstly carried out at different forming temperatures (20, 230 and 290 °C) and strain rates (2.5, 120 and 150 s−1) for AA5086 sheet. A modified Voce constitutive model (named Lin-Voce model) is proposed to describe the deformation behavior of AA5086 and its material parameters are identified by inverse analysis technique. Then, the proposed constitutive model is verified by comparing numerical and experimental results obtained by tensile tests and Marciniak test, respectively. Finally, the numerical simulation of Marciniak test is carried out at different temperatures (100, 200 and 300 °C) and strain rates (2.5, 120 and 150 s−1), and the effects of temperature and strain rate on the FLCs of AA5086 are investigated and discussed. |
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| Keywords: | Inverse analysis Lin-Voce constitutive model Marciniak test Forming limit curves |
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