Prediction of the corrosion-fatigue Wöhler curves of prestressing steel from crack growth rate measurements

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Title: Prediction of the corrosion-fatigue Wöhler curves of prestressing steel from crack growth rate measurements

Author(s): Martín Sanz, A. ; Llorca Martínez, J.; Sánchez-Gálvez, V.

Publication: ACHE

Volume: 41

Issue: 176

Appears on pages(s): 25 - 30

Keywords:

Date: 1/5/1990

Abstract:
Corrosion-fatigue Wöhler's curves obtention of prestressing steels by direct experimental measurements requires a high number of long duration tests, thus being an impractical approach. Therefore, a new mwthod for deriving corrosion-fatigue Wöhler's curves by numerical integration of crack growth rate data in prestressing steels was envisaged. Llorca and Sánchez-Gálvez method was used for numerical integration of ecperimental crack growth rates to derive the number cycles to rupure as a function of stress range. Wöhler's curve obtained a show good agreement with experimental results of corrosion-fatigue tests on smooth samples and can be used for fatigue calculation of prestressed structures subjected to cyclic loading in agressive envoironments.


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