Determination of Biaxial Flow Stress Using Frictionless Dome Test

The frictionless dome test can be used to evaluate formability and determine the flow stress curve of sheet materials under biaxial forming conditions. The flow stress curve, obtained from the frictionless dome test can be determined up to larger strains than in tensile test. As a result the need fo...

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Bibliographic Details
Published inProcedia engineering Vol. 81; pp. 1079 - 1083
Main Authors Groseclose, Adam, Son, Hyun-Sung, Dykeman, Jim, Altan, Taylan
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2014
Subjects
Biaxial flow stress
Frictionless dome test
Sheet material properties
Frictionless dome test
Sheet material properties
Biaxial flow stress
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Summary:The frictionless dome test can be used to evaluate formability and determine the flow stress curve of sheet materials under biaxial forming conditions. The flow stress curve, obtained from the frictionless dome test can be determined up to larger strains than in tensile test. As a result the need for extrapolation of the stress-strain curve is reduced. The objectives of this study are to (a) for a given sheet material determine K and n values in Hollomon's Law (σ = Kɛn) by using experimental punch force vs. stroke curve and (b) develop the computer program, “PRODOME”, to automate the calculation of K and n values.
ISSN:1877-7058
1877-7058
DOI:10.1016/j.proeng.2014.10.144