PSI - Issue 66

Anass Gouya et al. / Procedia Structural Integrity 66 (2024) 3–10 Author name / Structural Integrity Procedia 00 (2025) 000–000

9

7

the range, average stress, and length, on the other hand, are related to the wear mechanisms. These elements collectively have an impact on fatigue behavior. Different geometries were been examined for these processes. The findings of the experiments conducted imply that the outer wires' deterioration is the first step in the failure mechanism of copper wire rope. This may be ascribed to a number of variables, including the fact that the rope was functioning within the stress range, which is the most crucial element in determining how well a rope resists fatigue. The series of experiments that caused the copper conductor cables to break allowed for the plotting of the form of the tensile curve, which depicts the development of the applied force (N) as a function of displacement (mm) Table 3 . To maximize the mechanical performance of the conductor, the varied geometries are dependent on the cable diameters and the number of wires. According to the tensile curves for copper cables, the displacement rises as the number of wires decreases and the force rises as the diameter and number of wires increase Fig 1 . a b

Fig. 7.Curves of force versus displacement for the four models.

The test failure forces' values are shown in the Table 3 . Table 3.Maximum value at break for each mode.

Number of wires

7

7

45

45

Diameter of the cables (mm)

1.2

1.3

2.8

3

Failure forces (N)

140

132.71

666,66

894,73

4. Conclusion This work analyzed the results abrasion and tensile tests on samples of copper cables covered by PVC. To order to examine the copper cables protected by PVC, it was necessary to make a complete study, thus our work was focused on the abrasion testing for the insulation and the tensile testing for to evaluate the life and quality of the material as well as its durability. This paper presents the experimental results based on the effects of the most important parameters: The wire diameter, wire pitch, and wire elongation at break. Based on the above discussion, this study draws the following conclusions. Firstly, regarding abrasion, in the experimental parameters of the stable pressure abrasion test, the COF increases despite the velocity being uniform. The hardness of the insulation does not have a significant influence on the values of the coefficients of friction, which remained in the same range between μ=0.5 to μ=0.7, Note the importance of the number of abrasive cycles, which gives values as a function of time, that explaining that increasing the thickness of the PVC gives a large number of cycles as a function of time (as the Model D which gives 1650 in 12.2 min), thus,