TY  - JOUR
U1  - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed)
A1  - Metzger, Mario
A1  - Seifert, Thomas
T1  - Computational assessment of the microstructure-dependent plasticity of lamellar gray cast iron – Part IV: Assessment of the yield surface after plastic loading
JF  - International Journal of Solids and Structures
N2  - In this paper the yield surface of a recently presented microstructure-based volume element of the gray cast iron material GJL-250 is assessed after different plastic loading histories. The evolution of the yield surface is investigated for different volumetric, deviatoric and uniaxial loadings. The micromechanical material properties of the metallic matrix and the graphite inclusions are validated by means experimental stress-strain hysteresis loops. The metallic matrix is modeled as elastic-plastic with a non-linear kinematic hardening law. The graphite inclusions are described by means of a volumetric strain state dependent Young’s modulus. The results show that the shape of the yield surface does not change significantly in comparison to the initial yield surface after pure deviatoric loadings. After volumetric loadings, the dependence of the material on the Lode angle is significantly reduced. Uniaxial tensile preloadings result in a deformed yield surface, whereby the magnitude of the deformation depends on the applied load. Uniaxial preloadings to compression do not change the shape of the initial yield surface.
KW  - Plastizität
KW  - Gray cast iron
KW  - Microstructure
KW  - Micromechanics
KW  - Yield surface
KW  - Cyclic plasticity
KW  - Eisenguss
KW  - Mikrostruktur
Y1  - 2018
SN  - 0020-7683
SS  - 0020-7683
U6  - https://doi.org/10.1016/j.ijsolstr.2018.02.020
DO  - https://doi.org/10.1016/j.ijsolstr.2018.02.020
VL  - 141-142
SP  - 173
EP  - 182
PB  - Elsevier
ER  -