Computational assessment of the microstructure-dependent plasticity of lamellar gray cast iron – Part IV: Assessment of the yield surface after plastic loading
Computational assessment of the microstructure-dependent plasticity of lamellar gray cast iron – Part IV: Assessment of the yield surface after plastic loading
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片状灰铸铁微观结构相关塑性的计算评估 â 第四部分:塑性加载后屈服面的评估
DOI:
10.1016/j.ijsolstr.2018.02.020
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发表时间:
2018
影响因子:
3.6
通讯作者:
T. Seifert
中科院分区:
文献类型:
--
作者:
M. Metzger;T. Seifert
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.
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DOI:
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发表时间:
1992
期刊:
影响因子:
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作者:
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通讯作者:
H. E. Hjelm
DOI:
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1994
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2001
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2009
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1996
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作者:
P. Dierickx;C. Verdu;A. Reynaud;R. Fougères
通讯作者:
R. Fougères