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Determination of Edge Fracture Limit Strain for AHSS in the ISO-16630 Hole Expansion Test
Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.ORCID iD: 0000-0001-9889-6746
Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.ORCID iD: 0000-0002-7730-506x
SSAB Europe Oy, Finland..
Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.ORCID iD: 0000-0002-1162-7023
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2023 (English)In: 42ND CONFERENCE OF THE INTERNATIONAL DEEP DRAWING RESEARCH GROUP / [ed] Asnafi, N Lindgren, LE, IOP PUBLISHING LTD , 2023, Vol. 1284, article id 012027Conference paper, Published paper (Refereed)
Abstract [en]

With the increased demand for application of sustainable materials and lightweight structures, the sheet metal forming industry is forced to push existing materials to the limits. One area where this is particular difficult is when it comes to assessing the formability limit for sheet edges. For decades, the ISO-16630 Hole Expansion Test (HET) has been the industry standard for expressing the edge formability of sheet metals through the Hole Expansion Ratio (HER). However, in recent years, this test has been criticized for its high scatter in results for repeated experiments. This scatter has been suspected to be caused by the operator-reliant post-processing of the test, or variations in the cutting conditions for the different test specimens. This study investigates the impact of shifting the evaluation point of the test from the through-thickness crack to the onset of surface failure on the reported scatter, as well as performs inverse modeling of the Hole Expansion Test to obtain an edge limit strain value.

Place, publisher, year, edition, pages
IOP PUBLISHING LTD , 2023. Vol. 1284, article id 012027
Series
IOP Conference Series-Materials Science and Engineering, ISSN 1757-8981
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:bth-25240DOI: 10.1088/1757-899X/1284/1/012027ISI: 001017824300027OAI: oai:DiVA.org:bth-25240DiVA, id: diva2:1786283
Conference
42nd Conference of the International-Deep-Drawing-Research-Group (IDDRG), JUN 19-22, 2023, Lulea, SWEDEN
Part of project
PREDICT- Failure prediction for complex load cases, Knowledge Foundation, Vinnova
Funder
Vinnova, 2020-02986Available from: 2023-08-08 Created: 2023-08-08 Last updated: 2023-08-08Bibliographically approved

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Barlo, AlexanderSigvant, MatsIslam, Md. ShafiqulTuan Pham, QuocPilthammar, Johan

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