Stress-strain curves for hot-rolled steels
File(s)
Author(s)
Yun, X
Gardner, L
Type
Journal Article
Abstract
The use of advanced analytical and numerical modelling in structural engineering has increased rapidly in recent years. A key feature of these models is an accurate description of the material stress-strain behaviour. Development of standardised constitutive equations for the full engineering stress-strain response of hot-rolled carbon steels is the subject of the present paper. The proposed models, which offer different options for the representation of the strain hardening region, feature an elastic response up to the yield point, followed by a yield plateau and strain hardening up to the ultimate tensile stress. The Young's modulus E, the yield stress fy and the ultimate stress fu are generally readily available to the engineer, but other key parameters, including the strains at the onset of strain hardening and at the ultimate stress, are not, and hence require predictive expressions. These expressions have been developed herein and calibrated against material stress-strain data collected from the literature. Unlike the widely used ECCS model, which has a constant strain hardening slope, the proposed models, reflecting the collected test data, have a yield plateau length and strain hardening characteristics which vary with the ratio of yield to ultimate stress (i.e. with material grade). The proposed models require three basic input parameters (E, fy and fu), are simple to implement in analytical or numerical models, and are shown herein to be more accurate than the widely employed ECCS model. The proposed models are based on and hence representative of modern hot-rolled steels from around the world.
Date Issued
2017-06-01
Date Acceptance
2017-01-30
Citation
Journal of Constructional Steel Research, 2017, 133 (1), pp.36-46
ISSN
0143-974X
Publisher
Elsevier
Start Page
36
End Page
46
Journal / Book Title
Journal of Constructional Steel Research
Volume
133
Issue
1
Copyright Statement
© 2017, Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000400033100003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Construction & Building Technology
Engineering, Civil
Engineering
Constitutive modelling
Hot-rolled carbon steels
Material properties
Material modelling
Plasticity
Stress-strain relation
Strain hardening
Yield plateau
CONTINUOUS STRENGTH METHOD
SLENDERNESS LIMITS
BUCKLING BEHAVIOR
ULTIMATE BEHAVIOR
DESIGN
TESTS
BEAMS
COLUMNS
PERFORMANCE
SECTIONS
0905 Civil Engineering
0915 Interdisciplinary Engineering
1202 Building
Civil Engineering
Publication Status
Published
Date Publish Online
2017-02-08