PSI - Issue 38

5

Benaouda Abdellaoui et al. / Procedia Structural Integrity 38 (2022) 116–131 Benaouda Abdellaoui et al / Structural Integrity Procedia 00 (2021) 000 – 000

120

Fig. 2. (a) Tray 1 with rough pivots; (b) Tray 2 with rough specimen and pivot.

Two types of dog bone specimens were manufactured with a diameter of 6mm and a calibrated length of 42mm for the tensile specimen following the NF EN ISO 6892 standard and a diameter of 4, 37mm for the fatigue specimen (see. FCL15 specimen in in Fig. 3).

Fig. 3. Shape of fatigue test specimen – FCL15

All surface conditions were verified with an ALICONA high-resolution 3D optical surface machine and a ZEISS CALYPSO machine on all parts to be homogeneous and to avoid any breakage related to a surface defect. Pivots and specimens have the same surface topology characteristics. The mean results are presented in Table 3.

Table 3. Surface topology on raw specimens

ISO 4287

ISO 25178

Amplitude parameters - Roughness profile

Height settings

Ra Rz Rt

11.8 86.3 89.6

µm µm µm

Gaussian filter, 8 mm Gaussian filter, 8 mm Gaussian filter, 8 mm

Sa Sz

12.2 167

µm µm