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Improvement of accuracy in a free bending test for material characterization

Version 2 2024-06-04, 02:28
Version 1 2016-01-27, 10:23
journal contribution
posted on 2024-06-04, 02:28 authored by J Mendiguren, A Abvabi, Bernard RolfeBernard Rolfe, Matthias WeissMatthias Weiss
The effect of secondary (anticlastic) curvature and the stress state on the measurement of material properties in a free bending test is studied in order to improve the accuracy of the test. Experiments and numerical analysis are conducted on a medium strength 304L stainless steel and high strength dual-phase steels, DP780 and DP1000. The dependence of the secondary curvature on sample geometry is analysed and correction factors are introduced to improve the accuracy of the calculation of material properties when using plane strain or uniaxial stress two-dimensional assumptions. A free bending test procedure is proposed to characterize material behaviour close to yield. This will allow the quick and simple analysis of material properties for bending-dominated forming processes such as roll forming.

History

Journal

International journal of mechanical sciences

Volume

103

Pagination

288-296

Location

Oxford, Eng.

ISSN

0020-7403

eISSN

1879-2162

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2015, Elsevier

Publisher

Pergamon Press