A material model for aluminium sheet forming at elevated temperatures

Antonius H. van den Boogaard, R.J. Werkhoven, P.J. Bolt

Research output: Contribution to conferencePaperAcademic

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Abstract

In order to accurately simulate the deep drawing or stretching of aluminum sheet at elevated temperatures, a model is required that incorporates the temperature and strain-rate dependency of the material. In this paper two models are compared: a phenomenological material model in which the parameters of a Ludwik–Nadai hardening curve and a power law strain-rate influence are made temperature dependent and a physically-based model according to Bergstr¨om. The model incorporates the influence of the temperature on the flow stress and on the hardening rate and includes dynamic recovery aspects. Although both models can be fitted quite well to monotonic tensile tests, large differences appear if strain rate jumps are applied.
Original languageEnglish
Number of pages4
Publication statusPublished - 2001
EventESAFORM 2001: 4th International ESAFORM Conference on Material Forming - Liège, Belgium
Duration: 23 Apr 200125 Apr 2001
Conference number: 4

Conference

ConferenceESAFORM 2001
Abbreviated titleESAFORM
CountryBelgium
CityLiège
Period23/04/0125/04/01

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Aluminum sheet
Strain rate
Temperature
Hardening
Deep drawing
Plastic flow
Stretching
Recovery

Keywords

  • IR-59390

Cite this

van den Boogaard, A. H., Werkhoven, R. J., & Bolt, P. J. (2001). A material model for aluminium sheet forming at elevated temperatures. Paper presented at ESAFORM 2001, Liège, Belgium.
van den Boogaard, Antonius H. ; Werkhoven, R.J. ; Bolt, P.J. / A material model for aluminium sheet forming at elevated temperatures. Paper presented at ESAFORM 2001, Liège, Belgium.4 p.
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van den Boogaard, AH, Werkhoven, RJ & Bolt, PJ 2001, 'A material model for aluminium sheet forming at elevated temperatures' Paper presented at ESAFORM 2001, Liège, Belgium, 23/04/01 - 25/04/01, .

A material model for aluminium sheet forming at elevated temperatures. / van den Boogaard, Antonius H.; Werkhoven, R.J.; Bolt, P.J.

2001. Paper presented at ESAFORM 2001, Liège, Belgium.

Research output: Contribution to conferencePaperAcademic

TY - CONF

T1 - A material model for aluminium sheet forming at elevated temperatures

AU - van den Boogaard, Antonius H.

AU - Werkhoven, R.J.

AU - Bolt, P.J.

PY - 2001

Y1 - 2001

N2 - In order to accurately simulate the deep drawing or stretching of aluminum sheet at elevated temperatures, a model is required that incorporates the temperature and strain-rate dependency of the material. In this paper two models are compared: a phenomenological material model in which the parameters of a Ludwik–Nadai hardening curve and a power law strain-rate influence are made temperature dependent and a physically-based model according to Bergstr¨om. The model incorporates the influence of the temperature on the flow stress and on the hardening rate and includes dynamic recovery aspects. Although both models can be fitted quite well to monotonic tensile tests, large differences appear if strain rate jumps are applied.

AB - In order to accurately simulate the deep drawing or stretching of aluminum sheet at elevated temperatures, a model is required that incorporates the temperature and strain-rate dependency of the material. In this paper two models are compared: a phenomenological material model in which the parameters of a Ludwik–Nadai hardening curve and a power law strain-rate influence are made temperature dependent and a physically-based model according to Bergstr¨om. The model incorporates the influence of the temperature on the flow stress and on the hardening rate and includes dynamic recovery aspects. Although both models can be fitted quite well to monotonic tensile tests, large differences appear if strain rate jumps are applied.

KW - IR-59390

M3 - Paper

ER -

van den Boogaard AH, Werkhoven RJ, Bolt PJ. A material model for aluminium sheet forming at elevated temperatures. 2001. Paper presented at ESAFORM 2001, Liège, Belgium.