PSI - Issue 66

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

6

4

a

b

Fig 2. (a) Copper cable before breakage; (b)Copper cable after breakage.

2.5. Theories of rupture force The tensile test consists of imposing on a specimen a displacement on a specimen increasing with time. We measure the strain and stress resulting from this displacement and the elongation at break using the following classical equations: = / 0 (2) Therefore, we have ℰ = ∆ /L 0 (3) = = 0 � 1+ ∆ 0 � (4)

3. Result and discussion 3.1. Abrasion test results

The results showed the influence of the nature of the counter-body on the corrosion, the dynamics of the particles of the insulation and the wear rates during the abrasion tests. The movement of the blade applying a force of 7 N on the PVC explains the link between the thickness of the insulation and its durability. Table 2 Presents the abrasion test results for four cables with different geometry showing the numbers of cycle of the abrasion test as a function of time

Table 2.Results of the abrasion test.

Trial variables

Model A

Model B

Model C

Model D

Force (N)

7

7

7

7

Period of testing (min) Relative humidity of the Room(% )

5-7

5-7

12-13 70±4

12-13 70±4

70±4

70±4

Number of cycles

349

650

1500

1650