Author
Kwansoo Chung
Bio: Kwansoo Chung is an academic researcher from Seoul National University. The author has contributed to research in topics: Hardening (metallurgy) & Constitutive equation. The author has an hindex of 40, co-authored 177 publications receiving 6831 citations.
Papers published on a yearly basis
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TL;DR: In this article, a plane stress yield function that well describes the anisotropic behavior of sheet metals, in particular, aluminum alloy sheets, was proposed, which was introduced in the formulation using two linear transformations on the Cauchy stress tensor.
1,374 citations
TL;DR: In this article, a generalized phenomenological yield description is proposed to account for the behavior of the solute strengthened aluminum alloy sheets studied in this work and the experimental yield surfaces were found to be in good agreement with the polycrystal predictions for all materials and with the phenomenological predictions for most materials.
Abstract: In this work, yield surfaces were measured for binary aluminum-magnesium sheet samples which were fabricated by different processing paths to obtain different microstructures. The yielding behavior was measured using biaxial compression tests on cubic specimens made from laminated sheet samples. The yield surfaces were also predicted from a polycrystal model using crystallographic texture data as input and from a phenomenological yield function usually suitable for polycrystalline materials. The experimental yield surfaces were found to be in good agreement with the polycrystal predictions for all materials and with the phenomenological predictions for most materials. However, for samples processed with high cold rolling reduction prior to solution heat treatment, a significant difference was observed between the phenomenological and the experimental yield surfaces in the pure shear region. In this paper, a generalized phenomenological yield description is proposed to account for the behavior of the solute strengthened aluminum alloy sheets studied in this work. It is subsequently shown that this yield function is suitable for the description of the plastic behavior of any aluminum alloy sheet.
504 citations
TL;DR: Gelin et al. as discussed by the authors proposed a plane stress yield function based on Yld2000-2d for aluminum alloy sheets, which was implemented in a finite element code and compared with those of previously suggested yield functions.
270 citations
TL;DR: In this article, a new method has been developed and optimized employing a simple device, a special specimen geometry, and corrections for friction and off-axis loading for measuring hardening under reversed uniaxial loading.
248 citations
TL;DR: In this paper, yield surfaces for binary aluminum-magnesium sheet samples were measured using biaxial compression tests on cubic specimens made from laminated sheet samples, and the yield surfaces were also predicted from a polycrystal model using crystallographic texture data as input and from a phenomenological yield function proposed previously.
238 citations
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TL;DR: In this paper, a review of continuum-based variational formulations for describing the elastic-plastic deformation of anisotropic heterogeneous crystalline matter is presented and compared with experiments.
1,573 citations
TL;DR: In this article, a plane stress yield function that well describes the anisotropic behavior of sheet metals, in particular, aluminum alloy sheets, was proposed, which was introduced in the formulation using two linear transformations on the Cauchy stress tensor.
1,374 citations
TL;DR: In this paper, a 3D asymmetric fracture locus, in the space of equivalent fracture strain, stress triaxiality and the Lode angle parameter, is proposed.
1,351 citations
TL;DR: A review of the relations between microstructure and mechanical properties is presented in this article focusing on plasticity mechanisms, strain-hardening, yield stress, texture, fracture and fatigue.
Abstract: A significant increase in the research activity dedicated to high manganese TWIP steels has occurred during the past five years, motivated by the breakthrough combination of strength and ductility possessed by these alloys. Here a review of the relations between microstructure and mechanical properties is presented focusing on plasticity mechanisms, strain-hardening, yield stress, texture, fracture and fatigue. This summarized knowledge explains why TWIP steel metallurgy is currently a topic of great practical interest and fundamental importance. Finally, this publication indicates some of the main avenues for future investigations required in order to sustain the quality and the dynamism in this field.
1,114 citations
TL;DR: In this article, the monotonic and cyclic mechanical behavior of O-temper AZ31B Mg sheet was measured in large-strain tension/compression and simple shear.
897 citations