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A Study of the Boundary Conditions in the ISO-16630 Hole Expansion Test
Blekinge Institute of Technology, Sweden.
Blekinge Institute of Technology, Sweden; Volvo Cars, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Manufacturing Processes.ORCID iD: 0000-0002-1432-444X
Blekinge Institute of Technology, Sweden.
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2022 (English)In: IOP Conference Series: Materials Science and Engineering, ISSN 1757-8981, E-ISSN 1757-899X, Vol. 1238, article id 012031Article in journal (Refereed) Published
Abstract [en]

As new and more advanced sheet metal materials are introduced to the market, more accurate techniques for determination of failure limits are needed. One area that needs attention is edge formability, where the ISO-16630 standardized Hole Expansion Test currently is used to express this through the Hole Expansion Ratio. Over the years, this standard has been criticized for producing a large scatter in repeated tests. This paper investigates a new setup for the Hole Expansion Test which introduces draw beads into the setup to ensure sufficient restraining of the specimen during the test in an effort to reduced the scatter. In total 62 tests of a DP800 steel alloy were executed, but a large scatter in the results were still seen. It was therefore concluded that a lack of restraining force in the Hole Expansion Test was not the primary cause of the reported scatter seen in other tests.

Place, publisher, year, edition, pages
IOP Publishing , 2022. Vol. 1238, article id 012031
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:ri:diva-62545DOI: 10.1088/1757-899X/1238/1/012031OAI: oai:DiVA.org:ri-62545DiVA, id: diva2:1729773
Note

This study was alsofunded by VINNOVA in the Sustainable Production sub-program within Vehicle Strategic Research and Innovation (FFI) program (grant number 2020-02986).

Available from: 2023-01-23 Created: 2023-01-23 Last updated: 2023-05-25Bibliographically approved

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Publisher's full texthttps://dx.doi.org/10.1088/1757-899X/1238/1/012031

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Pérez Caro, Lluís

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