Modelling of aluminium sheet forming at elevated temperatures

A.H. van den Boogaard; J. Huetink

doi:10.1063/1.1766640

Modelling of aluminium sheet forming at elevated temperatures

A.H. van den Boogaard, J. Huetink

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

The formability of Al‐Mg sheet can be improved considerably, by increasing the temperature. By heating the sheet in areas with large shear strains, but cooling it on places where the risk of necking is high, the limiting drawing ratio can be increased to values above 2.5. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminium sheet, a material model is required that incorporates the temperature and strain‐rate dependency. In this paper simulations are presented of the deep drawing of a cylindrical cup, using shell elements. It is demonstrated that the familiar quadratic Hill yield function is not capable of describing the plastic deformation of aluminium. Hardening can be described successfully with a physically based material model for temperatures up to 200 °C. At higher temperatures and very low strain rates, the flow curve deviates significantly from the model.

Original language	English
Title of host publication	Materials processing and design : modeling, simulation and applications
Subtitle of host publication	NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes
Editors	Somnath Ghosh, Jose M. Castro, June K. Lee
Place of Publication	Melville, NY
Publisher	American Institute of Physics
Pages	893-898
ISBN (Electronic)	0-7354-0189-6
ISBN (Print)	0-7354-0188-8
DOIs	https://doi.org/10.1063/1.1766640
Publication status	Published - 13 Jun 2004
Event	8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004 - Columbus, United States Duration: 13 Jun 2004 → 17 Jun 2004 Conference number: 8

Publication series

Name	AIP Conference Proceedings
Publisher	AIP
Volume	712
ISSN (Print)	0094-243X

Conference

Conference	8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004
Abbreviated title	NUMIFORM
Country	United States
City	Columbus
Period	13/06/04 → 17/06/04

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van den Boogaard, A. H., & Huetink, J. (2004). Modelling of aluminium sheet forming at elevated temperatures. In S. Ghosh, J. M. Castro, & J. K. Lee (Eds.), Materials processing and design : modeling, simulation and applications: NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes (pp. 893-898). (AIP Conference Proceedings; Vol. 712). American Institute of Physics. https://doi.org/10.1063/1.1766640

van den Boogaard, A.H. ; Huetink, J. / Modelling of aluminium sheet forming at elevated temperatures. Materials processing and design : modeling, simulation and applications: NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. editor / Somnath Ghosh ; Jose M. Castro ; June K. Lee. Melville, NY : American Institute of Physics, 2004. pp. 893-898 (AIP Conference Proceedings).

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abstract = "The formability of Al‐Mg sheet can be improved considerably, by increasing the temperature. By heating the sheet in areas with large shear strains, but cooling it on places where the risk of necking is high, the limiting drawing ratio can be increased to values above 2.5. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminium sheet, a material model is required that incorporates the temperature and strain‐rate dependency. In this paper simulations are presented of the deep drawing of a cylindrical cup, using shell elements. It is demonstrated that the familiar quadratic Hill yield function is not capable of describing the plastic deformation of aluminium. Hardening can be described successfully with a physically based material model for temperatures up to 200 °C. At higher temperatures and very low strain rates, the flow curve deviates significantly from the model.",

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van den Boogaard, AH & Huetink, J 2004, Modelling of aluminium sheet forming at elevated temperatures. in S Ghosh, JM Castro & JK Lee (eds), Materials processing and design : modeling, simulation and applications: NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. AIP Conference Proceedings, vol. 712, American Institute of Physics, Melville, NY, pp. 893-898, 8th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2004, Columbus, United States, 13/06/04. https://doi.org/10.1063/1.1766640

Modelling of aluminium sheet forming at elevated temperatures. / van den Boogaard, A.H.; Huetink, J.

Materials processing and design : modeling, simulation and applications: NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. ed. / Somnath Ghosh; Jose M. Castro; June K. Lee. Melville, NY : American Institute of Physics, 2004. p. 893-898 (AIP Conference Proceedings; Vol. 712).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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N2 - The formability of Al‐Mg sheet can be improved considerably, by increasing the temperature. By heating the sheet in areas with large shear strains, but cooling it on places where the risk of necking is high, the limiting drawing ratio can be increased to values above 2.5. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminium sheet, a material model is required that incorporates the temperature and strain‐rate dependency. In this paper simulations are presented of the deep drawing of a cylindrical cup, using shell elements. It is demonstrated that the familiar quadratic Hill yield function is not capable of describing the plastic deformation of aluminium. Hardening can be described successfully with a physically based material model for temperatures up to 200 °C. At higher temperatures and very low strain rates, the flow curve deviates significantly from the model.

AB - The formability of Al‐Mg sheet can be improved considerably, by increasing the temperature. By heating the sheet in areas with large shear strains, but cooling it on places where the risk of necking is high, the limiting drawing ratio can be increased to values above 2.5. At elevated temperatures, the mechanical response of the material becomes strain rate dependent. To accurately simulate warm forming of aluminium sheet, a material model is required that incorporates the temperature and strain‐rate dependency. In this paper simulations are presented of the deep drawing of a cylindrical cup, using shell elements. It is demonstrated that the familiar quadratic Hill yield function is not capable of describing the plastic deformation of aluminium. Hardening can be described successfully with a physically based material model for temperatures up to 200 °C. At higher temperatures and very low strain rates, the flow curve deviates significantly from the model.

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van den Boogaard AH, Huetink J. Modelling of aluminium sheet forming at elevated temperatures. In Ghosh S, Castro JM, Lee JK, editors, Materials processing and design : modeling, simulation and applications: NUMIFORM 2004 : proceedings of the 8th International Conference on Numerical Methods in Industrial Forming Processes. Melville, NY: American Institute of Physics. 2004. p. 893-898. (AIP Conference Proceedings). https://doi.org/10.1063/1.1766640