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Appl. Sci. 2017, 7(1), 84; doi:10.3390/app7010084

The Role of Overloading on the Reduction of Residual Stress by Cyclic Loading in Cold-Drawn Prestressing Steel Wires

Fracture & Structural Integrity Research Group, University of Salamanca, Escuela Politécnica Superior, Campus Viriato, Avda. Requejo 33, Zamora 49022, Spain
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Academic Editor: Andy Alderson
Received: 30 November 2016 / Revised: 3 January 2017 / Accepted: 12 January 2017 / Published: 17 January 2017
(This article belongs to the Section Materials)
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Abstract

Prestressing steel wires are commonly used as reinforcement elements in structures bearing fatigue loads. These wires are obtained by a conforming process called cold drawing, where a progressive reduction of the wire diameter is produced, causing residual stress in the commercial wire. The aim of this paper is to analyze the effect of diverse in-service cyclic loading conditions (cyclic loading and cyclic loading with overload) on such a residual stress field. To achieve this goal, firstly, a numerical simulation of the wire drawing process of a commercial prestressing steel wire was carried out to reveal the residual stress state induced by the manufacture technique. Afterwards, a numerical simulation was performed of the in-service loading conditions of a prestressing steel wire in which the previously calculated residual stress state is included. The analysis of the obtained results shows a significant reduction of the residual stress state of about 50% for common in-service loadings and as high as 90% for certain cases undergoing overloads during cyclic loading. Therefore, an improvement of the mechanical performance of these structural components during their life in-service can be achieved. View Full-Text
Keywords: cold drawing; prestressing steels; residual stress; cyclic loading; stress redistribution cold drawing; prestressing steels; residual stress; cyclic loading; stress redistribution
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Toribio, J.; Lorenzo, M.; Vergara, D.; Aguado, L. The Role of Overloading on the Reduction of Residual Stress by Cyclic Loading in Cold-Drawn Prestressing Steel Wires. Appl. Sci. 2017, 7, 84.

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