Journal
MECHANICS OF MATERIALS
Volume 73, Issue -, Pages 51-57Publisher
ELSEVIER
DOI: 10.1016/j.mechmat.2014.01.010
Keywords
Constitutive equation; Yield strength; Metallic alloys
Categories
Funding
- Global Frontier R&D Program on Center for Hybrid Interface Materials (HIM) - Ministry of Science, ICT & Future Planning [2013-073298]
- Converging Research Center Program through the Ministry of Science, ICT and Future Planning [2013K000411]
- KIST-UNIST [2.130400.01]
- Future Strategic Fund of UNIST (Ulsan National Institute of Science and Technology) [1.130061.01]
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [2012R1A1A1043463]
- National Research Foundation of Korea [2012R1A1A1043463] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2014 Elsevier Ltd. All rights reserved.
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