PSI - Issue 18

Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000–000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 ScienceDirect

www.elsevier.com/locate/procedia

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Procedia Structural Integrity 18 (2019) 731–741

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Abstract Wire ropes are a complex hierarchical structure. They consist of several wires that are twisted together to form a structure with strong mechanical properties. These properties make cable an essential element applied in civil engineering, industry development and maritime industrial services. Nevertheless, the cables in service are subject to many variable loadings. They are related to mechanical, thermal and environmental effects that lead to different degradation mechanisms, which can occur alone or in combination. The corrosion effect is one of these mechanisms, which can cause accelerated damage to rope components and thus lead to sudden and unexpected failure. For this purpose, experimental tensile tests were conducted on virgin and corroded strand samples constituting the 19x7 non rotating steel wire rope to obtain the mechanical properties and predict the evolution of damage, as well as the life span of this strand. A mathematical model was developed to represent the damage to the strand. First, we adapted the theories of failure force using a coefficient related to the nature of the examined material. This coefficient was designed by considering two forces and giving a good approximation of the evolution of the experimental failure forces through the theoretically corrected failure forces using the modified Faupel’s formula. Then, the evolution of the theoretical damage can be deduced using the calculated forces. The different phases of damage and the critical life fraction that can lead to sudden failure of the wire rope were defined using these damage models. These techniques are important tools for industrialists to predict the service life of wire ropes and as well as establish a robust maintenance system that ensures the ability to operate in a safe and reliable environment. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 25th International Conference on Fracture and Structural Integrity Influence of co rosio on the m chanical b h vior of strand of a non-rotating wire rope: experimental study Abdeljalil Jikal a,b *, Fatima Majid b , Hassan Chaffou a , Mohamed El G orba b a Laboratory of Atmosphere's Physics and Modeling, FST M hammedia, Hassan II University of Cas blanca, BP 146 - Mohammedia, Morocco. b Laboratory of Control and Mechanical Characterization of Materials And Structures, National Higher School of Electricity and Mechanics (ENSEM), Hassan II University of Casablanca, B.P 8118 Oasis - Casablanca, Morocco. Abstract Wire ropes are a complex hierarchical structure. They consist of several wires that are twisted together to form a structure with strong mechanical properties. These properties make cable an essential element applied in civil engineering, industry development and maritime industrial services. Nevertheless, the cables in service are subject to many variable loadings. They are related to mechanical, thermal and environmental effects that lead to different degradation mechanisms, which can occur alone or in combination. The corrosion effect is one of these mechanisms, which can cause accelerated damage to rope components and thus lead to sudden and unexpected failure. For this purpose, experimental tensile tests were conducted on virgin and corroded strand samples constituting the 19x7 non rotating steel wire rope to obtain the mechanical properties and predict the evolution of damage, as well as the life span of this strand. A mathematical model was developed to represent the damage to the strand. First, we adapted the theories of failure force using a coefficient related to the nature of the examined material. This coefficient was designed by considering two forces and giving a good approximation of the evolution of the experimental failure forces through the theoretically corrected failure forces using the modified Faupel’s formula. Then, the evolution of the theoretical damage can be deduced using the calculated forces. The different phases of damage and the critical life fraction that can lead to sudden failure of the wire rope were defined using these damage models. These techniques are important tools for industrialists to predict the service life of wire ropes and as well as establish a robust maintenance system that ensures the ability to operate in a safe and reliable environment. © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 25th International Conference on Fracture and Structural Integrity Influence of corrosion on the mechanical behavior of strand of a non-rotating wire rope: experimental study Abdeljalil Jikal a,b *, Fatima Majid b , Hassan Chaffou a , Mohamed El Ghorba b a Laboratory of Atmosphere's Physics and Modeling, FST Mohammedia, Hassan II University of Casablanca, BP 146 - Mohammedia, Morocco. b Laboratory of Control and Mechanical Characterization of Materials And Structures, National Higher School of Electricity and Mechanics (ENSEM), Hassan II University of Casablanca, B.P 8118 Oasis - Casablanca, Morocco.

* Corresponding author. Tel.:+212620388941; E-mail address: abdeljalil.jikal@gmail.com

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. * Corresponding author. Tel.:+212620388941; E-mail address: abdeljalil.jikal@gmail.com

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2019.08.221