Based on the theory of damage mechanics, a viscoplastic constitutive modeling of anisotropic damage for the prediction of forming limit curve (FLC) is developed. The model takes into account the effect of rotation of principal damage coordinates on the deformation and damage behaviors. With the aid of the damage viscoplastic potential, the damage evolution equations are established. Based on a proposed damage criterion for localized necking, the model is employed to predict the FLC of aluminum 6111-T4 sheet alloy. The predicted results agree well with those determined experimentally.
Viscoplastic Constitutive Modeling of Anisotropic Damage Under Nonproportional Loading
Contributed by the Materials Division for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received by the Materials Division July 24, 2000. Guests Editors: Jian Cao and Z. Cedric Xia.
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Chow , C. L., Yang, X. J., and Chu, E. (July 24, 2000). "Viscoplastic Constitutive Modeling of Anisotropic Damage Under Nonproportional Loading ." ASME. J. Eng. Mater. Technol. October 2001; 123(4): 403–408. https://doi.org/10.1115/1.1395575
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