Predictions of forming limit diagrams using crystal plasticity models

Savoie, Jean; Jain, M.; Carr, Alan R.; Wu, Peidong; Neale, K.W.; Zhou, Y.; Jonas, J. J.

doi:10.1016/s0921-5093(98)00830-2

Cited by 42 publications

(15 citation statements)

References 6 publications

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“…[4] The addition of revised plasticity and kinematic hardening models and the results from studies of the influence of various material parameters (such as grain size and grain orientation effects, surface roughening effects, and other damage mechanisms) on strain localization have enhanced the reliability of the numerical models. [5][6][7][8][9][10][11][12] Despite the significant improvements that have been made to these models, inconsistencies still exist between the mechanical behavior that is predicted and the behavior that is observed experimentally. One possible source for these discrepancies is that the models used to predict the mechanical behavior are fundamentally deterministic and they simply cannot account for all of the variability that is possible in every microstructural component involved in the plastic deformation process of a polycrystalline material.…”

Section: Introductionmentioning

confidence: 99%

A Study of the Fundamental Relationships between Deformation-Induced Surface Roughness and Strain Localization in AA5754

Stoudt

Hubbard

Iadicola

et al. 2009

Metall Mater Trans A

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Three-dimensional, matrix-based statistical analysis methods were developed and integrated with high-resolution topographical imaging, to assess how microstructural changes influence the evolution of plastic deformation and strain localization in a commercial AA5754-O aluminum sheet in three in-plane strain modes. Analysis of the raw surface data revealed that the general composition of the surface roughness was highly sensitive to strain mode and strain level. The microstructural conditions that promote strain localization were assessed by extending a profilebased surface roughness parameter (Rt) to matrix form. Both analyses revealed that different strain modes produce characteristic dissimilarities in the deformation at the grain level. The localization data can be well characterized with a two-parameter Weibull distribution, suggesting that strain localization is a stochastic process that can be modeled reliably with Weibull statistics. This study clearly demonstrates that an accurate and straightforward probabilistic expression that captures the microstructural subtleties produced by plastic deformation can be developed from rigorous analyses of raw topographic data. Because variations in surface morphology profoundly influence the reliability of the numerical models used to predict strain localization, incorporating expressions of this type could greatly enhance the accuracy of these models.

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Section: Introductionmentioning

confidence: 99%

A Study of the Fundamental Relationships between Deformation-Induced Surface Roughness and Strain Localization in AA5754

Stoudt

Hubbard

Iadicola

et al. 2009

Metall Mater Trans A

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“…Several attempts have been made in the past where comprehensive studies have been conducted in which the influence of crystal anisotropy, texture, dislocation structure and microstructure on the forming limit diagrams (FLDs) and strain paths (Nakazima et al 1968;Kikuma and Nakazima 1971;Toth et al 1988;Wu et al 1997;Hiwatashi 1998;Savoie et al 1998;Hashiguchi and Protasov 2004;Eyckens et al 2009). Simulations are carried out iteratively to evaluate the limit strains as per the following procedure.…”

Section: Simulation For Determination Of Limit Strainsmentioning

confidence: 99%

Numerical simulation for determination of limit strains of a cold rolled and solution treated Nimonic C-263 alloy sheet

Ankamma¹,

Reddy

Nagarjuna

et al. 2011

Bull Mater Sci

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Nimonic alloys are Ni-base superalloys used for several high temperature applications, notable among them are the components in space vehicles, rocket engines, submarines, nuclear reactors, chemical processing vessels and heat exchange tubing as they exhibit excellent mechanical strength and creep resistance at high temperatures. Hence, evaluation of their formability characteristics is of utmost importance to make them into several useful components. Limit strains or forming limit curve is one of the parameters that indicates the formability, especially the drawability of sheet metal for deep drawing applications. In this paper, the limit strains of Nimonic C-263 alloy is investigated and presented using an explicit finite element code LSDYNA 3D. The material properties and the material model are evaluated by conducting tensile tests. The limit strains obtained from the simulation are verified by the analytical equations developed using vertex theory. The results tally within ±10% error.

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“…Regarding the M-K model many other references can be found in the literature (see e.g. Arrieux, 1995;Banabic and Dannemann, 2001;Banabic et al, 2005b;Butuc et al, 2003;Barlat, 1987;Chakrabarty et al, 1999;Friedman and Pan, 2000;Kuroda and Tvergaard, 2000;Lian and Zhou, 1989;Tadros and Mellor, 1975;Tvergaard, 1978;Rasmussen, 1982;Barata da Rocha et al, 1984-1985Savoie et al, 1998;Vacher et al, 1998;Wu et al, 2003;Zhao et al, 1996).…”

Section: Localized Necking Model According To Marciniak and Kuczyń Skimentioning

confidence: 99%

A simple isotropic-distortional hardening model and its application in elastic–plastic analysis of localized necking in orthotropic sheet metals

Aretz

2008

International Journal of Plasticity

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Predictions of forming limit diagrams using crystal plasticity models

Cited by 42 publications

References 6 publications

A Study of the Fundamental Relationships between Deformation-Induced Surface Roughness and Strain Localization in AA5754

A Study of the Fundamental Relationships between Deformation-Induced Surface Roughness and Strain Localization in AA5754

Numerical simulation for determination of limit strains of a cold rolled and solution treated Nimonic C-263 alloy sheet

A simple isotropic-distortional hardening model and its application in elastic–plastic analysis of localized necking in orthotropic sheet metals

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