Journal
MECHANICS OF MATERIALS
Volume 40, Issue 7, Pages 586-593Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.mechmat.2007.11.006
Keywords
flow stress; large strain; stress-strain curve; tensile test
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Funding
- Ministry of Trade, Industry & Energy (MOTIE), Republic of Korea [338] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [과C6B1810] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This paper presents a method for acquiring true stress-strain curves over large range of strains using engineering stress-strain curves obtained from a tensile test coupled with a finite element analysis. The results from the tensile test are analyzed using a rigid-plastic finite element method combined with a perfect analysis model for a simple bar to provide the deformation information. The reference true stress-strain curve, which predicts the necking point exactly, is modified iteratively to minimize the difference in the tensile force between the tensile test and the analyzed results. The validity of the approach is verified by comparing tensile test results with finite element solutions obtained using a modified true stress-strain curve. (c) 2007 Elsevier Ltd. All rights reserved.
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