Preprint Article Version 1 This version is not peer-reviewed

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

Version 1 : Received: 18 December 2018 / Approved: 19 December 2018 / Online: 19 December 2018 (12:14:27 CET)

A peer-reviewed article of this Preprint also exists.

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. 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.

Journal reference: Metals 2019, 9, 292
DOI: 10.3390/met9030292

Abstract

This paper analyses the evolution of the internal damage in two types of steel that show different fracture behaviours, with one of them being the initial material used for manufacturing prestressing steel wires, which shows a flat fracture surface perpendicular to the loading direction, and the other one being a standard steel used in reinforced concrete structures, which shows the typical cup-cone surface. 3mm-diameter cylindrical specimens are tested with a tensile test carried out in several loading stages and, after each of them, unloaded and analysed 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 behaviour.

Subject Areas

Steel; Tensile Test; XRCT; Damage Evolution; Gurson Model

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