Simulation of aluminium sheet forming at elevated temperatures

Research output: Contribution to journalArticleAcademicpeer-review

72 Citations (Scopus)

Abstract

The formability of aluminium sheet can be improved by increasing the temperature in some parts of the sheet and cooling other parts. Simulation of this process requires an accurate material model for the yield function and the temperature and strain-rate dependent hardening. In simulations of cylindrical cup deep drawing, the quadratic Hill yield criterion results in too much thinning in the bottom of the cup. The Vegter yield function is more flexible and gives better predictions. The model for work hardening and the temperature and strain-rate sensitivity needs to be accurate over the complete temperature range between the cooled and the heated parts of the sheet. It is demonstrated that the Bergström model is able to model the flow stress of Al–Mg alloys up to 200 °C and medium strain rates. For higher temperatures and low strain rates the deviations with experiments increase.
Original languageUndefined
Pages (from-to)6691-6709
Number of pages19
JournalComputer methods in applied mechanics and engineering
Volume195
Issue number48-49
DOIs
Publication statusPublished - 2006

Keywords

  • Yield function
  • Warm forming
  • Aluminium
  • IR-59597
  • Finite Element Analysis
  • Hardening
  • METIS-236110

Cite this

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title = "Simulation of aluminium sheet forming at elevated temperatures",
abstract = "The formability of aluminium sheet can be improved by increasing the temperature in some parts of the sheet and cooling other parts. Simulation of this process requires an accurate material model for the yield function and the temperature and strain-rate dependent hardening. In simulations of cylindrical cup deep drawing, the quadratic Hill yield criterion results in too much thinning in the bottom of the cup. The Vegter yield function is more flexible and gives better predictions. The model for work hardening and the temperature and strain-rate sensitivity needs to be accurate over the complete temperature range between the cooled and the heated parts of the sheet. It is demonstrated that the Bergstr{\"o}m model is able to model the flow stress of Al–Mg alloys up to 200 °C and medium strain rates. For higher temperatures and low strain rates the deviations with experiments increase.",
keywords = "Yield function, Warm forming, Aluminium, IR-59597, Finite Element Analysis, Hardening, METIS-236110",
author = "{van den Boogaard}, {Antonius H.} and Han Huetink",
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journal = "Computer methods in applied mechanics and engineering",
issn = "0045-7825",
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}

Simulation of aluminium sheet forming at elevated temperatures. / van den Boogaard, Antonius H.; Huetink, Han.

In: Computer methods in applied mechanics and engineering, Vol. 195, No. 48-49, 2006, p. 6691-6709.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Simulation of aluminium sheet forming at elevated temperatures

AU - van den Boogaard, Antonius H.

AU - Huetink, Han

PY - 2006

Y1 - 2006

N2 - The formability of aluminium sheet can be improved by increasing the temperature in some parts of the sheet and cooling other parts. Simulation of this process requires an accurate material model for the yield function and the temperature and strain-rate dependent hardening. In simulations of cylindrical cup deep drawing, the quadratic Hill yield criterion results in too much thinning in the bottom of the cup. The Vegter yield function is more flexible and gives better predictions. The model for work hardening and the temperature and strain-rate sensitivity needs to be accurate over the complete temperature range between the cooled and the heated parts of the sheet. It is demonstrated that the Bergström model is able to model the flow stress of Al–Mg alloys up to 200 °C and medium strain rates. For higher temperatures and low strain rates the deviations with experiments increase.

AB - The formability of aluminium sheet can be improved by increasing the temperature in some parts of the sheet and cooling other parts. Simulation of this process requires an accurate material model for the yield function and the temperature and strain-rate dependent hardening. In simulations of cylindrical cup deep drawing, the quadratic Hill yield criterion results in too much thinning in the bottom of the cup. The Vegter yield function is more flexible and gives better predictions. The model for work hardening and the temperature and strain-rate sensitivity needs to be accurate over the complete temperature range between the cooled and the heated parts of the sheet. It is demonstrated that the Bergström model is able to model the flow stress of Al–Mg alloys up to 200 °C and medium strain rates. For higher temperatures and low strain rates the deviations with experiments increase.

KW - Yield function

KW - Warm forming

KW - Aluminium

KW - IR-59597

KW - Finite Element Analysis

KW - Hardening

KW - METIS-236110

U2 - 10.1016/j.cma.2005.05.054

DO - 10.1016/j.cma.2005.05.054

M3 - Article

VL - 195

SP - 6691

EP - 6709

JO - Computer methods in applied mechanics and engineering

JF - Computer methods in applied mechanics and engineering

SN - 0045-7825

IS - 48-49

ER -