For the purpose of identification of fracture criteria we perform SEM analysis of the microstructure in the vicinity of fracture area at blanking operation. The conclusions of the experimental work were used to set up fracture criterion in simulations of blanking.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 12474395In the computer simulation, we considered upgraded constitutive model, which takes into account the development of damage on the mikroskale. Such simulation results agreed perfectly with experiments carried out.
F.02 Acquisition of new scientific knowledge
COBISS.SI-ID: 12473371The paper focuses on a reliable identification of the hardening curve of sheet metal after the onset of necking by means of a purposely developed shear test. The main comparative advantage of the test is its simple implementation needing no further development of the experimental equipment used in standard tensile testing. In addition, in order to achieve more flexible hardening curve description from those given by the classical analytical hardening laws, the paper presents the hardening curve approximation based on the cubic spline technique. The identified hardening curves are validated and compared to the analytically extrapolated ones obtained by a continuation of classical hardening laws for large plastic strain. It is shown, that due to large difference in response the analytical extrapolation is seriously disputable.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 12328987