Strain-rate control in hydraulic bulge-tests: Theory and experiments
Holger ARETZ, Antonella COMETA, Ton VAN DEN BOOGAARD
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
Sheet Metal Forming, Bulge-Test, Strain-Rate Control
Published online 5/7/2025, 8 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Holger ARETZ, Antonella COMETA, Ton VAN DEN BOOGAARD, Strain-rate control in hydraulic bulge-tests: Theory and experiments, Materials Research Proceedings, Vol. 54, pp 1046-1053, 2025
DOI: https://doi.org/10.21741/9781644903599-113
The article was published as article 113 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
References
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