authors |
Amaral, R; Santos, AD; Lopes, AB |
nationality |
International |
journal |
CIENCIA & TECNOLOGIA DOS MATERIAIS |
author keywords |
Sheet metal forming; dual-phase steels; flow curve; biaxial hydraulic bulge; yield locus |
keywords |
SHEET METALS; STRESS |
abstract |
Numerical simulations of sheet metal forming processes need the establishment of highly reliable results, which in turn need the accurate identification of mechanical properties. In this paper a study is presented on the choice of the characterization function of flow stress-strain curve of sheet metal materials, as well as the selection of the best yield locus, based on experimental uniaxial tensile and biaxial hydraulic bulge tests performed on dual-phase steels of industrial interest. To obtain a better characterization of the hardening curve, a combination is made using the uniaxial tensile test data with biaxial hydraulic bulge test results, since bulge test covers a larger range of plastic strain when compared to tensile test. Since the two flow curves have different strain paths, they can't be directly compared or combined. Therefore, it is necessary a transformation of flow stress-strain curve provided from biaxial bulge test into equivalent stress-strain curve. Different methodologies were applied to transform biaxial stress-strain curve to an equivalent one and the different results are compared and evaluated. (C) 2017 Portuguese Society of Materials (SPM). Published by Elsevier Espana, S.L.U. All rights reserved. |
publisher |
ELSEVIER ESPANA S I |
issn |
0870-8312 |
year published |
2017 |
volume |
29 |
issue |
1 |
beginning page |
E239 |
ending page |
E243 |
digital object identifier (doi) |
10.1016/j.ctmat.2016.06.007 |
web of science category |
Materials Science, Multidisciplinary |
subject category |
Materials Science |
unique article identifier |
WOS:000412098700046
|