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Open AccessArticle

The Evolution of Internal Damage Identified by Means of X-ray Computed Tomography in Two Steels and the Ensuing Relation with Gurson’s Numerical Modelling

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Departamento de Ingeniería Mecánica y Minera, Universidad de Jaén, 23071 Jaén, Spain
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Instituto IMDEA Materiales, C/Eric Kandel 2, Tecnogetafe, 28906 Madrid, Spain
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Departamento de Ingeniería Civil-Construcción, Universidad Politécnica de Madrid, E.T.S.I. Caminos, Canales y Puertos, 28040 Madrid, Spain
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Departamento de Ciencia de Materiales, Universidad Politécnica de Madrid, E.T.S.I. Caminos, Canales y Puertos, 28040 Madrid, Spain
*
Author to whom correspondence should be addressed.
Metals 2019, 9(3), 292; https://doi.org/10.3390/met9030292
Received: 18 December 2018 / Revised: 29 January 2019 / Accepted: 25 February 2019 / Published: 5 March 2019
(This article belongs to the Special Issue Metal Fracture Modeling)
This paper analyzes the evolution of the internal damage in two types of steel that show different fracture behaviors, with one of them being the initial material used for manufacturing prestressing steel wires, and the other one being a standard steel used in reinforced concrete structures. The first of them shows a flat fracture surface perpendicular to the loading direction while the second one shows the typical cup-cone surface. 3 mm-diameter cylindrical specimens are tested with a tensile test carried out in several loading steps and, after each of them, unloaded and analyzed with X-ray tomography, which allows detection of internal damage throughout the tensile test. In the steel used for reinforcement, damage is developed progressively in the whole specimen, as predicted by Gurson-type models, while in the steel used for manufacturing prestressing steel-wire, damage is developed only in the very last part of the test. In addition to the experimental study, a numerical analysis is carried out by means of the finite element method by using a Gurson model to reproduce the material behavior. View Full-Text
Keywords: steel; tensile test; XRCT; damage evolution; Gurson model steel; tensile test; XRCT; damage evolution; Gurson model
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MDPI and ACS Style

Suárez, F.; Sket, F.; Gálvez, J.C.; Cendón, D.A.; Atienza, J.M.; Molina-Aldareguia, J. The Evolution of Internal Damage Identified by Means of X-ray Computed Tomography in Two Steels and the Ensuing Relation with Gurson’s Numerical Modelling. Metals 2019, 9, 292.

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