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Numerical Study of Large Deformation Problem of Nonlinear Viscoplasticity

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Abstract:

Large deformation problem under dynamic loading has been an issue for mechanical engineer and researcher who study continuum mechanics because of its complex behavior. This study focuses on a large deformation problem based on nonlinear viscoplasticity. Therefore, the Johnson-Cook constitutive model and the Zerilli-Armstrong constitutive model are used to analyze and to understand this stretch example under dynamic loading. Numerical results for stretch example using both constitutive models were compared with the results from ABAQUS/Explicit that considered mesh sensitivity analysis, and were then applied to model failure processes of OFHC copper, with consideration of geometric nonlinearity based on concepts of progressive damage mechanics. This approach helps us to understand and to predict the behavior of large deformation and to perform damage failure analysis.

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Periodical:

Advanced Materials Research (Volume 716)

Pages:

680-687

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.716.680

Citation:

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Online since:

July 2013

Authors:

Dong Keon Kim, Jong Wan Hu

Keywords:

Constitutive Model, Damage, Large Deformation, Viscoplasticity

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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