Abstract
The tough fuel economy and emissions standards facing automotive industry creates the need for lightweight construction and the use of new generation of materials. However, the use of non-conventional materials leads to difficulties in the prediction of material behaviour during sheet metal forming processes, including damage and formability limits, thus challenging the numerical simulation. This paper seeks to contribute in the prediction of fracture on sheet metal alloys. Three constitutive damage models are used, GTN, Johnson Cook and Lemaitre, to simulate, as realistically as possible, the mechanical behaviour of the sheet metal material. The corresponding parameters of damage models are identified using an inverse analysis procedure, based on experimental test data. Finally, to validate and verify the applicability of the studied damage models to predict fracture, experiments are compared with FE simulations.
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Acknowledgements
Authors gratefully acknowledge the funding of SciTech - Science and Technology for Competitive and Sustainable Industries, R &D project NORTE-01-0145-FEDER-000022 cofinanced by Programa Operacional Regional do Norte (”NORTE2020”), through Fundo Europeu de Desenvolvimento Regional (FEDER) and the financial support of FCT - Fundação para a Ciência e Tecnologia, under project PTDC / EMS-TEC / 6400/2014. The first author is also grateful to the FCT for the Doctoral grant SFRH/BD/119362/2016.
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Amaral, R., Teixeira, P., Santos, A.D. et al. Assessment of different ductile damage models and experimental validation. Int J Mater Form 11, 435–444 (2018). https://doi.org/10.1007/s12289-017-1381-4
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DOI: https://doi.org/10.1007/s12289-017-1381-4