Environmentally-assisted fatigue crack growth in prestressing steel wires

被引：0
作者：
J. Toribio
J. C. Matos
B. González
J. Escuadra
机构：
[1] University of Salamanca,
来源：
Materials Science | 2012年 / 47卷
关键词：
numerical modeling; fatigue crack propagation; prestressing steel bars; Ca(OH)2 + NaCl corrosion fatigue;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We present the evolution of the surface crack front in prestressing reinforced-concrete steel wires subjected to fatigue in air and to corrosion fatigue in Ca(OH)2 + NaCl. To this end, a numerical modeling was performed on the basis of discretization of the crack front (with elliptic shape) by considering that the crack advance at each point is perpendicular to the analyzed front according to the Paris–Erdogan law and using a three-parameter solution for the stress intensity factor (SIF). Each analyzed case (a particular geometry of the initial crack) was characterized by the evolution of the aspect ratio of the semielliptic crack (ratio of the semiaxes of the ellipse) with the relative crack depth and by the variations of the maximum dimensionless SIF at the crack front.
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页码：764 / 772
页数：8
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