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

Materials

Jesús Toribio¹  Juan-Carlos Matos²  Beatriz González²  José Escuadra² 

[1] Fracture and Structural Integrity Research Group, University of Salamanca, E.P.S., Campus Viriato, Avda. Requejo 33, 49022 Zamora, Spain

关键词: prestressing steel wires;    semi-elliptical surface cracks;    numerical modeling;    Walker law;    residual stress profile;    fatigue crack propagation;    crack front aspect ratio;    preferential crack path;   

DOI  :  10.3390/ma8115400

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.