Description of stress-strain curves for cold-formed steels
By L. Gardner, X. Yun. Construction and Building Materials, 2018
332 citations recorded by the source corpus.
Abstract Cold-formed steels are generally characterized by a rounded stress-strain response with no sharply defined yield point. It is shown herein that this material behaviour can be accurately described by a two-stage Ramberg-Osgood model provided that the values of the key input parameters can be established. The focus of the present paper is to develop predictive expressions for these key parameters to enable the full engineering stress-strain response of cold-formed steels to be represented. The predictive expressions are based on the analysis of a comprehensive set of material stress-strain data collected from the literature. In total, more than 700 experimentally-derived stress-strain curves on cold-formed steel material have been collected from around the world, covering a range of steel grades, thicknesses and cross-section types. The strength enhancement in the corner regions of cold-formed sections has also been analysed and the applicability of existing predictive models has been evaluated. Finally, standardized values of strain-hardening exponents used in the Ramberg-Osgood model have been recommended for both flat and corner material in cold-formed steel sections. The proposed stress-strain curves are suitable for use in advanced numerical simulations and parametric studies on cold-formed steel elements.
Subfields: Building and Construction, Civil and Structural Engineering
View Paper: https://www.semanticscholar.org/paper/4fa22889ea6d5a464e41ebc67c49c085e6b794b5
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Citations in the corpus
- Compressive testing and numerical modelling of concrete-filled double skin CHS with austenitic stainless steel outer tubes (2019, methodology): “2), static tensile strength (u), Young's 177 modulus (E), elongation at fracture (εf) based on the respective gauge lengths and 178 compound Ramberg-Osgood parameters (n and m) which describe the shape of the 179 stress-strain curve [39-42].”
- Stability and design of stainless steel structures – Review and outlook (2019, methodology): “[13], as well as by Gardner and Yun [14] for application to coldformed steel, which are included in the Fourth Edition of the European Design Manual for Structural Stainless Steel [15] and are expected to be included in future revisions of Eurocode 3 Part 1.”
- Elasto-plastic behaviour and design of semi-compact circular hollow sections (2020, methodology): “To model the material behaviour, the experimental stress-strain relationships were used when available; otherwise, the predictive models developed by Yun and Gardner [77] and Gardner and Yun [78] were employed to generate the stressstrain curves for hot-rolled and cold-formed steel sections respecti”
- Behaviour and design of fixed‐ended steel equal‐leg angle section columns (2021, unknown): “5) were utilised; where not available, and throughout the parametric study, the material models developed by Yun and Gardner [30] and Gardner and Yun [31] were employed for hot-rolled and cold-formed steel angles respectively.”