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Materials 2015, 8(11), 7589-7597; doi:10.3390/ma8115400

Influence of Residual Stress Field on the Fatigue Crack Propagation in Prestressing Steel Wires

Fracture and Structural Integrity Research Group, University of Salamanca, E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain
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Academic Editor: Reza H. Oskouei
Received: 29 July 2015 / Revised: 25 October 2015 / Accepted: 3 November 2015 / Published: 11 November 2015
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Abstract

This paper deals with the effect of several residual stress profiles on the fatigue crack propagation in prestressing steel wires subjected to tension loading or bending moment. To this end, a computer program was developed to evaluate the crack front evolution on the basis of the Walker law. Results demonstrate that the absence of residual stresses makes the crack propagate towards a preferential crack path. When surface residual stresses are tensile and, correspondingly, core residual stresses are compressive, the fatigue crack fronts rapidly converge towards a quasi-straight shape. When surface residual stresses are compressive, with their corresponding tensile stresses in the core area, a preferential crack path also appears. View Full-Text
Keywords: prestressing steel wires; semi-elliptical surface cracks; numerical modeling; Walker law; residual stress profile; fatigue crack propagation; crack front aspect ratio; preferential crack path prestressing steel wires; semi-elliptical surface cracks; numerical modeling; Walker law; residual stress profile; fatigue crack propagation; crack front aspect ratio; preferential crack path
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.; Matos, J.-C.; González, B.; Escuadra, J. Influence of Residual Stress Field on the Fatigue Crack Propagation in Prestressing Steel Wires. Materials 2015, 8, 7589-7597.

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