PSI - Issue 57

Giorgio A. B. Oliveira et al. / Procedia Structural Integrity 57 (2024) 228–235 Giorgio A. B. Oliveira et al./ Structural Integrity Procedia 00 (2023) 000 – 000

230

3

P Q B

P Q B

B

B

Loads

Loads

P Q 1 Q 2

P Q 2 Q 1

Time

Time

(A)

(B)

Fig. 1. Representation of the loads in (A) H-L configuration; (B) L-H configuration; (C) Application loads in the specimen.

Model Q (N/mm) P (N/mm) Q/P (MPa) N f (cycles) High 210 300 0.7 70 0.85

Table 2. Fretting Fatigue loading configuration of each configuration.

122,037 146,178 168,048 345,313 350,891

Low

120

300

0.4

70

0.85

3. Modelling

3.1. Numerical model

All numerical models to compute the stress field related to the tests in study have been implemented using the ABAQUS commercialfinite element (FE) software in conjunction with Python scripts. For details concerning the FE modelling, see (Brito Oliveira et., 2023). In summary, the FE model under consideration exhibits coarse elements in regions distant from the contact area, while employing a refined and structured mesh in proximity to the contacting surfaces, as can be seen in Fig 2. Thus, as shown in Fig. 1, initially the cylindrical pad is pressed against the flat specimen by applying a normal load, P , then the alternate bulk load, B , is imposed on the specimen concurrently with the tangentialload, Q , which is applied to the pad. Hence, two numerical simulations have been performed, for each high and low block so that later some damage models can be evaluated.