PSI - Issue 66

Grzegorz Glodek et al. / Procedia Structural Integrity 66 (2024) 331–336 Author name / Structural Integrity Procedia 00 (2025) 000 – 000

334

4

Fixed

Minium Mesh Size = 10µm COF = 0.55

2a

Centre of contact

-1

1

10mm

F A

Figure 2 Finite element model of the dovetail geometry testing apparatus.

(a)

(b)

σ [MPa]

1500

1000

500

810

0

Slip

Slip

495

-500

Stick

18.0 kN

-1000

Tangential Shear Mises

-1500

σ Principal, Max [MPa]

-2000

-1.5

-1

-0.5

0

0.5

1

1.5

-1240

810

x/a

Figure 3 (a) Contact stress distribution between the sample and the fretting pads at the maximum load of 18kN and (b) contour plot of the maximum in-plane principal stress in the dovetail section of the test specimen.

3.2. Fretting fatigue lifetimes Figure 4 presents the results of fretting fatigue tests performed on AM-Ti64, alongside data from tests conducted on conventionally wrought material. The AM-Ti64 shows comparable resistance to fretting fatigue when compared to the wrought material, with both demonstrating a similar range of lifetimes at equivalent load levels. However, both materials exhibit high sensitivity to variations in load, where even slight changes in applied force result in significant differences in lifetimes, such as a 5×10 5 cycle difference between wrought material tested at 18 kN and