Three-Stage Full-Range Stress-Strain Model for Stainless Steels
Publication: Journal of Structural Engineering
Volume 134, Issue 9
Abstract
Advanced numerical modeling of cold-formed stainless steel members, from manufacturing to full-range response under applied loading, requires knowledge of the stress-strain relationship of the material over a wide range of tensile and compressive strains. Although a number of stress-strain models have been developed for stainless steels, they are only capable of accurate predictions either over a limited strain range or for the tensile stress-strain behavior only. This paper presents a three-stage stress-strain model for stainless steels, which is capable of accurate predictions over the full ranges of both tensile and compressive strains. The new stress-strain model is defined using the three basic Ramberg-Osgood parameters and is based on a careful interpretation of existing experimental data. The accuracy of the proposed model is demonstrated by comparing its predictions with experimental stress-strain curves. These comparisons also clearly demonstrate the advantage of the proposed model over the only existing full-range stress-strain model.
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Acknowledgments
The writers would like to thank The Hong Kong Polytechnic University (Project No. G-V864), the University of Macau (Ref. No. RG070/05-06S/QWM/FST), and the Research Grants Council of the Hong Kong S.A.R. (Project No. PolyU5056/02E) for their financial support.
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Information & Authors
Information
Published In
Journal of Structural Engineering
Volume 134 • Issue 9 • September 2008
Pages: 1518 - 1527
Copyright
© 2008 ASCE.
History
Received: Jun 19, 2007
Accepted: Jan 28, 2008
Published online: Sep 1, 2008
Published in print: Sep 2008
Notes
Note. Associate Editor: Kim J. R. Rasmussen
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