Universal Stress-Strain Equation for Metallic Materials
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 8
Abstract
This paper presents an equation that governs the stress-strain behavior of any metallic material subjected to uniaxial stress tests under any stress or strain rate and under any temperature; thus, it can be considered as a universal model of uniaxial stress-strain behavior in which the classical models—lineal, perfectly plastic, elastic perfectly plastic, or those that obey a power law—are regarded as simple limiting cases of such an equation. Consequently, the equation represents one line only, which is continuous and differentiable at every point, and it is not necessary to draw it separately in sections to characterize the different phases or singular points that appear in the curves of building steel at room temperature, including different yield peaks (upper and lower), the plastic plateau, or even the Portevin-Le Chatelier effect that such a plateau often presents.
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Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 8 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Jan 16, 2013
Accepted: Jul 30, 2013
Published online: Aug 1, 2013
Published in print: Aug 1, 2014
Discussion open until: Sep 18, 2014
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