TY - JOUR

T1 - Characterisation of the quasi-static flow and fracture behaviour of dual-phase steel sheets in a wide range of plane stress states

AU - Behrens, B. A.

AU - Bouguecha, A.

AU - Vucetic, M.

AU - Peshekhodov, I.

N1 - Funding information: The financial support through Stiftung Stahlanwendungsforschung in the frame of the project P830 “Sheared Edge Formability” coordinated by Forschungsvereinigung Stahlanwendung e.V. is gratefully acknowledged. The authors also thank Salzgitter Mannesmann Forschung GmbH for the fruitful collaboration and the provided material as well as Ford Research & Advanced Engineering Europe for valuable comments on the experiments and support with specimen preparation.

PY - 2012/7/4

Y1 - 2012/7/4

N2 - An approach to characterise the flow and fracture behaviour with the help of a modified Miyauchi shear test, a uniaxial tensile test on standard, holed, waisted specimens as well as a hydraulic bulge test is presented. The modification of the Miyauchi specimen is related to the geometry of the shear zones. The new geometry helps suppress plastic strain concentration at the edges and increase deformation in the material interior, which allows for accurate fracture characterisation. With the help of the experimental and numerical tests analyses, the flow behaviour and equivalent plastic strain at fracture were estimated for two common cold-rolled dual-phase steels in a wide range of plane stress states. With the obtained data, the applicability of the phenomenological Johnson-Cook fracture model to describe the fracture behaviour of this material type is questioned and a need for a more extensive fracture behaviour characterisation and advanced modelling is shown.

AB - An approach to characterise the flow and fracture behaviour with the help of a modified Miyauchi shear test, a uniaxial tensile test on standard, holed, waisted specimens as well as a hydraulic bulge test is presented. The modification of the Miyauchi specimen is related to the geometry of the shear zones. The new geometry helps suppress plastic strain concentration at the edges and increase deformation in the material interior, which allows for accurate fracture characterisation. With the help of the experimental and numerical tests analyses, the flow behaviour and equivalent plastic strain at fracture were estimated for two common cold-rolled dual-phase steels in a wide range of plane stress states. With the obtained data, the applicability of the phenomenological Johnson-Cook fracture model to describe the fracture behaviour of this material type is questioned and a need for a more extensive fracture behaviour characterisation and advanced modelling is shown.

KW - Dual-phase steel

KW - FEA

KW - Fracture

KW - Shear test

KW - Sheet metal

UR - http://www.scopus.com/inward/record.url?scp=84875802759&partnerID=8YFLogxK

U2 - 10.1016/j.acme.2012.06.017

DO - 10.1016/j.acme.2012.06.017

M3 - Article

AN - SCOPUS:84875802759

VL - 12

SP - 397

EP - 406

JO - Archives of Civil and Mechanical Engineering

JF - Archives of Civil and Mechanical Engineering

SN - 1644-9665

IS - 4

ER -