A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet

S. Kurukuri, M. Ghosh, Antonius H. van den Boogaard

Abstract

The formability of aluminum sheet can be improved considerably by increasing the temperature. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminum sheet, a material model is required that incorporates the temperature and strain rate dependency. In this paper, the dislocation based Alflow hardening model is used. The model incorporates the influence of the temperature and strain rate effect on the flow stress by means of the storage and dynamic recovery of dislocations. It also includes the effects of solute level, particle fraction and grain size. Cylindrical cup deep drawing simulations are presented using shell elements. The anisotropic behavior of the sheet is described by using the Vegter yield locus. Experimental drawing test data is used to validate the modeling approach, where the model parameters follow from tensile tests.
Original languageUndefined
Pages333-338
StatePublished - 2008
Event9th International Conference Technology of Plasticity, ICTP 2008 - Gyeongju, Korea, Republic of

Conference

Conference9th International Conference Technology of Plasticity, ICTP 2008
Abbreviated titleICTP
CountryKorea, Republic of
CityGyeongju
Period7/09/0811/09/08

Fingerprint

Temperature
Aluminum sheet
Strain rate
Formability
Plastic flow
Hardening
Recovery

Keywords

  • IR-60342

Cite this

Kurukuri, S., Ghosh, M., & van den Boogaard, A. H. (2008). A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet. 333-338. Paper presented at 9th International Conference Technology of Plasticity, ICTP 2008, Gyeongju, Korea, Republic of.

Kurukuri, S.; Ghosh, M.; van den Boogaard, Antonius H. / A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet.

2008. 333-338 Paper presented at 9th International Conference Technology of Plasticity, ICTP 2008, Gyeongju, Korea, Republic of.

Research output: ScientificPaper

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abstract = "The formability of aluminum sheet can be improved considerably by increasing the temperature. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminum sheet, a material model is required that incorporates the temperature and strain rate dependency. In this paper, the dislocation based Alflow hardening model is used. The model incorporates the influence of the temperature and strain rate effect on the flow stress by means of the storage and dynamic recovery of dislocations. It also includes the effects of solute level, particle fraction and grain size. Cylindrical cup deep drawing simulations are presented using shell elements. The anisotropic behavior of the sheet is described by using the Vegter yield locus. Experimental drawing test data is used to validate the modeling approach, where the model parameters follow from tensile tests.",
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Kurukuri, S, Ghosh, M & van den Boogaard, AH 2008, 'A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet' Paper presented at 9th International Conference Technology of Plasticity, ICTP 2008, Gyeongju, Korea, Republic of, 7/09/08 - 11/09/08, pp. 333-338.

A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet. / Kurukuri, S.; Ghosh, M.; van den Boogaard, Antonius H.

2008. 333-338 Paper presented at 9th International Conference Technology of Plasticity, ICTP 2008, Gyeongju, Korea, Republic of.

Research output: ScientificPaper

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AU - Ghosh,M.

AU - van den Boogaard,Antonius H.

PY - 2008

Y1 - 2008

N2 - The formability of aluminum sheet can be improved considerably by increasing the temperature. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminum sheet, a material model is required that incorporates the temperature and strain rate dependency. In this paper, the dislocation based Alflow hardening model is used. The model incorporates the influence of the temperature and strain rate effect on the flow stress by means of the storage and dynamic recovery of dislocations. It also includes the effects of solute level, particle fraction and grain size. Cylindrical cup deep drawing simulations are presented using shell elements. The anisotropic behavior of the sheet is described by using the Vegter yield locus. Experimental drawing test data is used to validate the modeling approach, where the model parameters follow from tensile tests.

AB - The formability of aluminum sheet can be improved considerably by increasing the temperature. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminum sheet, a material model is required that incorporates the temperature and strain rate dependency. In this paper, the dislocation based Alflow hardening model is used. The model incorporates the influence of the temperature and strain rate effect on the flow stress by means of the storage and dynamic recovery of dislocations. It also includes the effects of solute level, particle fraction and grain size. Cylindrical cup deep drawing simulations are presented using shell elements. The anisotropic behavior of the sheet is described by using the Vegter yield locus. Experimental drawing test data is used to validate the modeling approach, where the model parameters follow from tensile tests.

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Kurukuri S, Ghosh M, van den Boogaard AH. A Dislocation based Constitutive Model for Warm Forming of Aluminum Sheet. 2008. Paper presented at 9th International Conference Technology of Plasticity, ICTP 2008, Gyeongju, Korea, Republic of.