Abstract
A new yield function depends on the second stress invariant J2 and the third stress invariant J3 is proposed to describe the elastoplastic behavior of sheet metals. Additionally, a series of basic fracture testing covering a wide range of stress state and different material orientations for aluminum alloy is carried out. The ductile fracture of the aluminum alloy is investigated using a hybrid experimental–numerical approach. Besides, a new uncoupled ductile fracture that is concerned with the micro-mechanisms of voids is introduced to predict the failure of material. The new yield criterion and fracture model are implemented into the ABAQUS/Explicit code to predict the fracture in different stress states. The incremental sheet-forming tests are performed to verify the efficiency of the proposed yield criterion and fracture criterion. The proposed yield criterion and fracture model can be utilized for predicting plastic deformation and initial fracture in sheet metal forming.
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Acknowledgements
This work was supported by the Ministry of Education of the Republic of Korea and the National Research Foundation of Korea (NRF-2019R1A2C1011224).
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© 2022 The Minerals, Metals & Materials Society
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Quach, H., **ao, X., Kim, J.J., Kim, Y.S. (2022). Numerical Prediction of Failure in Single Point Incremental Forming Using a New Yield Criterion for Sheet Metal. In: Inal, K., Levesque, J., Worswick, M., Butcher, C. (eds) NUMISHEET 2022. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-06212-4_11
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DOI: https://doi.org/10.1007/978-3-031-06212-4_11
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