Evaluation of neck shape of notched round-bar specimens during tensile test

Notched round-bar tensile tests were conducted on three types of metals, and their flow stress curves were identified. Deformation of the specimens was recorded using two CCD cameras and the changes in their cross-sectional radius were measured using a digital image correlation method. The average t...

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Bibliographic Details
Published in:Procedia manufacturing 2018, Vol.15, p.1762-1768
Main Authors: Nishiwaki, Takeshi, Murata, Masanobu, Yoshida, Yoshinori
Format: Article
Language:English
Subjects:
Degital image correlation
Flow stress
Local necking
Notched specimen
Tensile test
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Summary:Notched round-bar tensile tests were conducted on three types of metals, and their flow stress curves were identified. Deformation of the specimens was recorded using two CCD cameras and the changes in their cross-sectional radius were measured using a digital image correlation method. The average tensile stress was corrected through an inverse analysis, and the numerical results coincided with the experimental results. Measurements of the longitudinal profiles of a necked specimen were also carried out. Numerical analysis results using the identified flow stress curve showed a good agreement with the experimental results.
ISSN:2351-9789
2351-9789
DOI:10.1016/j.promfg.2018.07.248