CFM 2019

Influence of corrosion on the endurance limit prediction of wire rope and its components in shape of Wöhler curves
Abdeljalil Jikal  1, 2, *@  , Hassan Chaffoui  1@  , Mohamed El Ghorba  2@  
1 : Laboratory Of Atmosphere's Physics and Modeling, FST Mohammedia, Hassan II University Of Casablanca, Morocco
2 : Laboratory Of Control And Mechanical Characterization Of Materials And Structures, National Higher School Of Electricity And Mechanics (ENSEM), Hassan II University Of Casablanca, Morocco
* : Auteur correspondant

Wire ropes are rather complex hierarchical structures. They consist of several wires twisted together to obtain a structure with enormous mechanical properties. These properties make cable an essential element and used in many industrial structures such as lifting loads, floating structures, suspended bridges and the mining industry. Nevertheless, the cables in service are subjected to several variable loadings. They are related to mechanical, thermal and environmental effects that lead to different degradation mechanisms, which can occur alone or in combination. One of these mechanisms is the corrosion effect, which can cause accelerated damage to cable components and lead to sudden and unexpected failure. In this context, experimental tensile tests were carried out on virgin and corroded samples of 19*7 non- rotating wire rope in order to predict the damage evolution and the lifetime of this structure. Furthermore, the influence of corrosion on the endurance limit was investigated by establishing S-N curves. The experimental results obtained in this paper, show that corrosion fatigue can lead to a decrease in fatigue strength and accelerate fatigue damage in the rope. This new approach can estimate well the fatigue life of wire ropes from static tests.


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