Effect of Thickness Stress in Stretch-Bending

Antonius H. van den Boogaard; W.C. Emmens; Han Huetink

Effect of Thickness Stress in Stretch-Bending

Antonius H. van den Boogaard
, W.C. Emmens
, Han Huetink

Faculty of Engineering Technology

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

3 Citations (Scopus)

20 Downloads (Pure)

Abstract

In any situation where a strip is pulled over a curved tool, locally a contact stress acts on the strip in thickness direction. This contact stress changes the stress state in the material, which will influence the deformation. One effect is that the yield stress in the plane of the strip is reduced. Predictions by a simple model agree with observation from a 90-degree bending test found in literature, and indirectly with observation from a stretch-bend test found in literature. The change in stress state also affects the formability. This is analyzed by applying the maximum force condition on this situation. The predictions agree with a more thorough analysis of the effect of thickness stress in general, but the predictions of both methods are lower than actually observed in tests.

Original language	Undefined
Title of host publication	Numiform 2010, Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes
Editors	F Barlat, Y.H. Moon, M.G. Lee
Place of Publication	Pohang
Publisher	American Institute of Physics
Pages	504-511
ISBN (Print)	978-0-7354-0799-2
Publication status	Published - 13 Jun 2010
Event	10th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2010 - Pohang, Korea, Republic of Duration: 13 Jun 2010 → 17 Jun 2010 Conference number: 10

Publication series

Name	AIP Conference Proceedings
Publisher	American Institute of Physics
Volume	1252
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	10th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2010
Abbreviated title	NUMIFORM
Country/Territory	Korea, Republic of
City	Pohang
Period	13/06/10 → 17/06/10

Keywords

METIS-266994
IR-71871

Cite this

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title = "Effect of Thickness Stress in Stretch-Bending",

abstract = "In any situation where a strip is pulled over a curved tool, locally a contact stress acts on the strip in thickness direction. This contact stress changes the stress state in the material, which will influence the deformation. One effect is that the yield stress in the plane of the strip is reduced. Predictions by a simple model agree with observation from a 90-degree bending test found in literature, and indirectly with observation from a stretch-bend test found in literature. The change in stress state also affects the formability. This is analyzed by applying the maximum force condition on this situation. The predictions agree with a more thorough analysis of the effect of thickness stress in general, but the predictions of both methods are lower than actually observed in tests.",

keywords = "METIS-266994, IR-71871",

author = "\{van den Boogaard\}, \{Antonius H.\} and W.C. Emmens and Han Huetink",

year = "2010",

month = jun,

day = "13",

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isbn = "978-0-7354-0799-2",

series = "AIP Conference Proceedings",

publisher = "American Institute of Physics",

pages = "504--511",

editor = "F Barlat and Y.H. Moon and M.G. Lee",

booktitle = "Numiform 2010, Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes",

address = "United States",

note = "10th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2010 ; Conference date: 13-06-2010 Through 17-06-2010",

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van den Boogaard, AH, Emmens, WC & Huetink, H 2010, Effect of Thickness Stress in Stretch-Bending. in F Barlat, YH Moon & MG Lee (eds), Numiform 2010, Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes. AIP Conference Proceedings, vol. 1252, American Institute of Physics, Pohang, pp. 504-511, 10th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2010, Pohang, Korea, Republic of, 13/06/10.

Effect of Thickness Stress in Stretch-Bending. / van den Boogaard, Antonius H.; Emmens, W.C.; Huetink, Han.
Numiform 2010, Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes. ed. / F Barlat; Y.H. Moon; M.G. Lee. Pohang: American Institute of Physics, 2010. p. 504-511 (AIP Conference Proceedings; Vol. 1252).

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

TY - GEN

T1 - Effect of Thickness Stress in Stretch-Bending

AU - van den Boogaard, Antonius H.

AU - Emmens, W.C.

AU - Huetink, Han

N1 - Conference code: 10

PY - 2010/6/13

Y1 - 2010/6/13

N2 - In any situation where a strip is pulled over a curved tool, locally a contact stress acts on the strip in thickness direction. This contact stress changes the stress state in the material, which will influence the deformation. One effect is that the yield stress in the plane of the strip is reduced. Predictions by a simple model agree with observation from a 90-degree bending test found in literature, and indirectly with observation from a stretch-bend test found in literature. The change in stress state also affects the formability. This is analyzed by applying the maximum force condition on this situation. The predictions agree with a more thorough analysis of the effect of thickness stress in general, but the predictions of both methods are lower than actually observed in tests.

AB - In any situation where a strip is pulled over a curved tool, locally a contact stress acts on the strip in thickness direction. This contact stress changes the stress state in the material, which will influence the deformation. One effect is that the yield stress in the plane of the strip is reduced. Predictions by a simple model agree with observation from a 90-degree bending test found in literature, and indirectly with observation from a stretch-bend test found in literature. The change in stress state also affects the formability. This is analyzed by applying the maximum force condition on this situation. The predictions agree with a more thorough analysis of the effect of thickness stress in general, but the predictions of both methods are lower than actually observed in tests.

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KW - IR-71871

M3 - Conference contribution

SN - 978-0-7354-0799-2

T3 - AIP Conference Proceedings

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BT - Numiform 2010, Proceedings of the 10th International Conference on Numerical Methods in Industrial Forming Processes

A2 - Barlat, F

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A2 - Lee, M.G.

PB - American Institute of Physics

CY - Pohang

T2 - 10th International Conference on Numerical Methods in Industrial Forming Processes, NUMIFORM 2010

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