Prediction of Cyclic Behaviors of Mild Steel at Large Plastic Strain Using Coupon Test Results
Publication: Journal of Structural Engineering
Volume 140, Issue 2
Abstract
In practice, engineers can usually only obtain material properties from monotonic tensile coupon tests. The aim of this paper is to predict cyclic plasticity of mild steel from coupon test results available. First, the theory of metal plasticity is generally reviewed, and selected models are introduced, i.e., Prager’s hardening rule, the Chaboche models, and the Yoshida-Uemori model. Calibration methods of the material parameters of each model are proposed and limitations of the models are addressed. Then, a modified Yoshida-Uemori model is proposed. Monotonic tensile coupon tests and a series of tests of hourglass-type specimens were carried out under different loading histories to fracture. Numerical simulations using the selected plasticity models and the modified Yoshida-Uemori model were carried out to simulate the cyclic behaviors of hourglass-type specimens using the material parameters calibrated by the monotonic coupon test results. The comparison results show that the modified Yoshida-Uemori model gives the best prediction of the cyclic behaviors of mild steel in large plastic strain ranges.
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Acknowledgments
The research reported herein was sponsored by the Ministry of Education under the Grant-in-Aid for Scientific Research (A) No. 23246097 with the title “Study on the coupling of buckling and fracture of steel structural members.” This financial support is sincerely acknowledged. The experimental support and helpful discussions from Dr. Tsuyoshi Koyama are greatly appreciated.
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Published In
Journal of Structural Engineering
Volume 140 • Issue 2 • February 2014
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Jul 17, 2012
Accepted: Apr 8, 2013
Published online: Apr 10, 2013
Published in print: Feb 1, 2014
Discussion open until: Mar 14, 2014
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