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Kim, Young-Cheon
Robust Multifunctional Materials Lab
Research Interests
  • Effect of Material Characteristic Lengths on Mechanical Behavior of Metals

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Constitutive equations optimized for determining strengths of metallic alloys

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Title
Constitutive equations optimized for determining strengths of metallic alloys
Author
Kang, Seung-KyunKim, Young-CheonKim, Kug-HwanKwon, DongilKim, Ju-Young
Keywords
Constitutive equation; Metallic alloys; Yield strength
Issue Date
201406
Publisher
ELSEVIER SCIENCE BV
Citation
MECHANICS OF MATERIALS, v.73, no., pp.51 - 57
Abstract
We investigate compatibilities of three constitutive equations, the Hollomon, the Swift, and the Voce equations for determination of yield and ultimate tensile strengths based on tensile true stress-strain curves of 27 metal alloys including those with power-law type and linear-type strain-hardening. We analyze each constitutive equation in terms of yield strength determined by the intercept of the linear elastic loading curve and plastic flow curve and ultimate tensile strength evaluated by the concept of instability in tension. We found that the describing plastic flow is very sensitive in determination of the yield strength and tensile strength from parameters of constitutive equation. Voce equation gives estimate yield strength and tensile strength better than Hollomon and Swift equations.
URI
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DOI
http://dx.doi.org/10.1016/j.mechmat.2014.01.010
ISSN
0167-6636
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