Numerical procedures for predicting localization in sheet metals using crystal plasticity
SCIE
SCOPUS
- Title
- Numerical procedures for predicting localization in sheet metals using crystal plasticity
- Authors
- Ji Hoon Kim; Lee, MG; Daeyong Kim; Barlat, F
- Date Issued
- 2013-05
- Publisher
- Elsevier B.V
- Abstract
- In order to obtain reliable solutions for the initiation of localized instability in sheet metal forming, numerical procedures are developed for predicting forming limits using crystal plasticity. The Marciniak-Kuczynski (M-K) method is employed to calculate the initiation of the instability with rate-dependent elastic-crystal plasticity for cubic metals. The Nelder-Mead (N-M) direct search and Newton-Raphson (N-R) methods are used to solve the highly nonlinear equilibrium and associated compatibility equations under the M-K scheme. The N-M method eliminates the need of the first-order derivatives of the constitutive equations that may not be readily available for complex material models. The numerical results show that the calculation time using the N-M method is comparable to that using the N-R for the highly nonlinear M-K equations if the simplex size parameters are properly optimized. (c) 2013 Elsevier B.V. All rights reserved.
- Keywords
- Formability; Forming limit; Crystal plasticity; Simplex method; Direct search; FORMING LIMIT PREDICTION; CRYSTALLOGRAPHIC TEXTURE; STRAIN-PATH; DEFORMATION; FCC; EVOLUTION; DIAGRAMS; SOLIDS
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/27438
- DOI
- 10.1016/J.COMMATSCI.2013.02.008
- ISSN
- 0927-0256
- Article Type
- Article
- Citation
- Computational Materials Science, vol. 72, page. 107 - 115, 2013-05
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- There are no files associated with this item.
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