Ajuste de los aceros corrugados ferríticos, austeníticos y austenoferríticos a los modelos de endurecimiento elastoplástico por deformación

Beatriz Hortigón; José M. Gallardo; Enrique J. Nieto-García; José A. López

doi:10.3989/revmetalm.94

Authors

Beatriz Hortigón Structures Research Group. Superior Polytechnic School, University of Seville https://orcid.org/0000-0002-3362-3648
José M. Gallardo Superior Technical School of Engineering, University of Seville https://orcid.org/0000-0002-7007-2259
Enrique J. Nieto-García Structures Research Group. Superior Polytechnic School, University of Seville https://orcid.org/0000-0001-9657-9421
José A. López Superior School of Architecture, University of Seville https://orcid.org/0000-0002-8227-6523

DOI:

https://doi.org/10.3989/revmetalm.94

Keywords:

Elastoplastic behavior, Hollomon curve, Patterned bar, Ramberg-Osgood curve, Strain hardening exponent, Stress-strain curve

Abstract

The elastoplastic behaviour of steel used for structural member fabrication has received attention to facilitate a mechanical-resistant design. New Zealand and South African standards have adopted various theoretical approaches to describe such behaviour in stainless steels. With respect to the building industry, describing the tensile behaviour of steel rebar used to produce reinforced concrete structures is of interest. Differences compared with the homogenous material described in the above mentioned standards and related literatures are discussed in this paper. Specifically, the presence of ribs and the TEMPCORE® technology used to produce carbon steel rebar may alter the elastoplastic model. Carbon steel rebar is shown to fit a Hollomon model giving hardening exponent values on the order of 0.17. Austenitic stainless steel rebar behaviour is better described using a modified Rasmussen model with a free fitted exponent of 6. Duplex stainless steel shows a poor fit to any previous model.

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