Finite element simulations of cold deformation at the mesoscale

G. B. Sarma; B. Radhakrishnan; T. Zacharia

doi:10.1016/s0927-0256(98)00036-6

Finite element simulations of cold deformation at the mesoscale

G. B. Sarma, B. Radhakrishnan, T. Zacharia

Multiscale Materials

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69 Scopus citations

Abstract

The deformation of polycrystalline aggregates is modeled using the finite element method. Explicit discretization at the single crystal level is employed to study the inhomogeneous deformations of individual crystals. Plastic deformation by crystallographic slip is treated using a constitutive model based on crystal plasticity. The formulation is used to predict the non-uniform nature of strain hardening and texture evolution in the crystals subjected to plane strain compression. The capability of the simulations to capture the inhomogeneous deformation of individual grains during plastic deformation of polycrystals is demonstrated. The hardness and orientation values of elements from the same grain evolve to different final values due to local inhomogeneities and interactions with neighbors. The simulations provide a means to obtain quantitative information on the inhomogeneous distributions of stored energy and orientations among the different crystals comprising the microstructure.

Original language	English
Pages (from-to)	105-123
Number of pages	19
Journal	Computational Materials Science
Volume	12
Issue number	2
DOIs	https://doi.org/10.1016/s0927-0256(98)00036-6
State	Published - Sep 1998

Funding

This research was sponsored by the Division of Materials Science, US Department of Energy, under contract DE-AC05-96OR22464 with Lockheed Martin Energy Research Corporation. The research was supported in part by an appointment to the Oak Ridge National Laboratory Postdoctoral Research Associates Program administered jointly by the Oak Ridge National Laboratory and the Oak Ridge Institute for Science and Education. The authors acknowledge the use of the Intel PARAGON XP/S 35 located in the Oak Ridge National Laboratory Center for Computational Sciences (CCS), funded by the Department of Energy's Office of Scientific Computing.

Funders	Funder number
Lockheed Martin Energy Research Corporation
Oak Ridge National Laboratory
Oak Ridge National Laboratory
Office of Scientific Computing
U.S. Department of Energy	DE-AC05-96OR22464
Oak Ridge National Laboratory
Oak Ridge Institute for Science and Education
Division of Materials Sciences and Engineering

Keywords

Crystal plasticity
Finite element method
Inhomogeneous deformations
Mesoscale modeling
Texture development

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10.1016/s0927-0256(98)00036-6

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abstract = "The deformation of polycrystalline aggregates is modeled using the finite element method. Explicit discretization at the single crystal level is employed to study the inhomogeneous deformations of individual crystals. Plastic deformation by crystallographic slip is treated using a constitutive model based on crystal plasticity. The formulation is used to predict the non-uniform nature of strain hardening and texture evolution in the crystals subjected to plane strain compression. The capability of the simulations to capture the inhomogeneous deformation of individual grains during plastic deformation of polycrystals is demonstrated. The hardness and orientation values of elements from the same grain evolve to different final values due to local inhomogeneities and interactions with neighbors. The simulations provide a means to obtain quantitative information on the inhomogeneous distributions of stored energy and orientations among the different crystals comprising the microstructure.",

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AU - Sarma, G. B.

AU - Radhakrishnan, B.

AU - Zacharia, T.

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N2 - The deformation of polycrystalline aggregates is modeled using the finite element method. Explicit discretization at the single crystal level is employed to study the inhomogeneous deformations of individual crystals. Plastic deformation by crystallographic slip is treated using a constitutive model based on crystal plasticity. The formulation is used to predict the non-uniform nature of strain hardening and texture evolution in the crystals subjected to plane strain compression. The capability of the simulations to capture the inhomogeneous deformation of individual grains during plastic deformation of polycrystals is demonstrated. The hardness and orientation values of elements from the same grain evolve to different final values due to local inhomogeneities and interactions with neighbors. The simulations provide a means to obtain quantitative information on the inhomogeneous distributions of stored energy and orientations among the different crystals comprising the microstructure.

AB - The deformation of polycrystalline aggregates is modeled using the finite element method. Explicit discretization at the single crystal level is employed to study the inhomogeneous deformations of individual crystals. Plastic deformation by crystallographic slip is treated using a constitutive model based on crystal plasticity. The formulation is used to predict the non-uniform nature of strain hardening and texture evolution in the crystals subjected to plane strain compression. The capability of the simulations to capture the inhomogeneous deformation of individual grains during plastic deformation of polycrystals is demonstrated. The hardness and orientation values of elements from the same grain evolve to different final values due to local inhomogeneities and interactions with neighbors. The simulations provide a means to obtain quantitative information on the inhomogeneous distributions of stored energy and orientations among the different crystals comprising the microstructure.

KW - Crystal plasticity

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KW - Inhomogeneous deformations

KW - Mesoscale modeling

KW - Texture development

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Finite element simulations of cold deformation at the mesoscale

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