Strain-rate control in hydraulic bulge-tests: Theory and experiments

Holger Aretz; Antonella Cometa; Ton van den Boogaard

doi:10.21741/9781644903599-113

Strain-rate control in hydraulic bulge-tests: Theory and experiments

Holger Aretz^*, Antonella Cometa, Ton van den Boogaard

^*Corresponding author for this work

Nonlinear Solid Mechanics

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

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Abstract

Based on a theoretically deduced relationship between the piston velocity and its displacement, an open-loop strain-rate control concept for the hydraulic bulge-test was developed. An application example demonstrates that the test results in terms of the hardening curve were in very good agreement with those obtained using a corresponding closed-loop control concept. A disadvantage of the proposed open-loop control concept is the fact that it requires a preceding step to determine a material dependent functional relationship between the equivalent plastic strain and the piston displacement. Despite of this, the advantages of the proposed control concept by far exceed its drawbacks. Thus, it is regarded as an attractive alternative to closed-loop strain-rate control.

Original language	English
Title of host publication	28th International ESAFORM Conference on Material Forming, ESAFORM 2025
Editors	Pierpaolo Carlone, Luigino Filice, Domenico Umbrello
Publisher	Association of American Publishers
Pages	1046-1053
Number of pages	8
ISBN (Print)	9781644903599
DOIs	https://doi.org/10.21741/9781644903599-113
Publication status	Published - 2025
Event	28th International ESAFORM Conference on Material Forming, ESAFORM 2025: ESAFORM 2025 - Paestum, Italy Duration: 7 May 2025 → 9 May 2025 Conference number: 28

Publication series

Name	Materials Research Proceedings
Volume	54
ISSN (Print)	2474-3941
ISSN (Electronic)	2474-395X

Conference

Conference	28th International ESAFORM Conference on Material Forming, ESAFORM 2025
Country/Territory	Italy
City	Paestum
Period	7/05/25 → 9/05/25

Keywords

Bulge-Test
Sheet Metal Forming
Strain-Rate Control

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10.21741/9781644903599-113Licence: CC BY

113Final published version, 899 KBLicence: CC BY

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Aretz, H., Cometa, A., & van den Boogaard, T. (2025). Strain-rate control in hydraulic bulge-tests: Theory and experiments. In P. Carlone, L. Filice, & D. Umbrello (Eds.), 28th International ESAFORM Conference on Material Forming, ESAFORM 2025 (pp. 1046-1053). (Materials Research Proceedings; Vol. 54). Association of American Publishers. https://doi.org/10.21741/9781644903599-113

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title = "Strain-rate control in hydraulic bulge-tests: Theory and experiments",

abstract = "Based on a theoretically deduced relationship between the piston velocity and its displacement, an open-loop strain-rate control concept for the hydraulic bulge-test was developed. An application example demonstrates that the test results in terms of the hardening curve were in very good agreement with those obtained using a corresponding closed-loop control concept. A disadvantage of the proposed open-loop control concept is the fact that it requires a preceding step to determine a material dependent functional relationship between the equivalent plastic strain and the piston displacement. Despite of this, the advantages of the proposed control concept by far exceed its drawbacks. Thus, it is regarded as an attractive alternative to closed-loop strain-rate control.",

keywords = "Bulge-Test, Sheet Metal Forming, Strain-Rate Control",

author = "Holger Aretz and Antonella Cometa and \{van den Boogaard\}, Ton",

note = "Publisher Copyright: {\textcopyright} 2025, Association of American Publishers. All rights reserved.; 28th International ESAFORM Conference on Material Forming, ESAFORM 2025 : ESAFORM 2025 ; Conference date: 07-05-2025 Through 09-05-2025",

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language = "English",

isbn = "9781644903599",

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Aretz, H, Cometa, A & van den Boogaard, T 2025, Strain-rate control in hydraulic bulge-tests: Theory and experiments. in P Carlone, L Filice & D Umbrello (eds), 28th International ESAFORM Conference on Material Forming, ESAFORM 2025. Materials Research Proceedings, vol. 54, Association of American Publishers, pp. 1046-1053, 28th International ESAFORM Conference on Material Forming, ESAFORM 2025, Paestum, Italy, 7/05/25. https://doi.org/10.21741/9781644903599-113

Strain-rate control in hydraulic bulge-tests: Theory and experiments. / Aretz, Holger; Cometa, Antonella ; van den Boogaard, Ton.
28th International ESAFORM Conference on Material Forming, ESAFORM 2025. ed. / Pierpaolo Carlone; Luigino Filice; Domenico Umbrello. Association of American Publishers, 2025. p. 1046-1053 (Materials Research Proceedings; Vol. 54).

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

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AU - Aretz, Holger

AU - Cometa, Antonella

AU - van den Boogaard, Ton

N1 - Conference code: 28

PY - 2025

Y1 - 2025

N2 - Based on a theoretically deduced relationship between the piston velocity and its displacement, an open-loop strain-rate control concept for the hydraulic bulge-test was developed. An application example demonstrates that the test results in terms of the hardening curve were in very good agreement with those obtained using a corresponding closed-loop control concept. A disadvantage of the proposed open-loop control concept is the fact that it requires a preceding step to determine a material dependent functional relationship between the equivalent plastic strain and the piston displacement. Despite of this, the advantages of the proposed control concept by far exceed its drawbacks. Thus, it is regarded as an attractive alternative to closed-loop strain-rate control.

AB - Based on a theoretically deduced relationship between the piston velocity and its displacement, an open-loop strain-rate control concept for the hydraulic bulge-test was developed. An application example demonstrates that the test results in terms of the hardening curve were in very good agreement with those obtained using a corresponding closed-loop control concept. A disadvantage of the proposed open-loop control concept is the fact that it requires a preceding step to determine a material dependent functional relationship between the equivalent plastic strain and the piston displacement. Despite of this, the advantages of the proposed control concept by far exceed its drawbacks. Thus, it is regarded as an attractive alternative to closed-loop strain-rate control.

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KW - Sheet Metal Forming

KW - Strain-Rate Control

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BT - 28th International ESAFORM Conference on Material Forming, ESAFORM 2025

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PB - Association of American Publishers

Y2 - 7 May 2025 through 9 May 2025

ER -

Strain-rate control in hydraulic bulge-tests: Theory and experiments

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