Fretting fatigue of 7050-T7451 Al alloy: the influence of bulk mean stress

Fretting‐fatigue analysis of shot‐peened aluminium and titanium test specimens

“…The fatigue life of shot-peened components subject to fretting fatigue loading is evaluated by means of the Carpinteri et al criterion for fretting fatigue, 47,48 which is a multiaxial criterion based on the concept of critical plane. First, the stress field is determined by considering both the relaxed residual stress (i.e., σ res presented in Section 3.2), the stress components due to fretting fatigue loading (Equation 9 presented in Section 3.3) and a loading ratio equal to −1.0.…”

“…40,41 In the present paper, fretting fatigue tests carried out on shot-peened aluminium and titanium alloys 40,46 are simulated by employing the multiaxial Carpinteri et al criterion for fretting fatigue. 47,48 The stress field, employed as input data for the above criterion, takes into account both shot peening relaxed residual stresses and fretting fatigue stress field. In particular, a novel theoretical law for the relaxed residual stress field is here proposed, and its accuracy is verified by employing the experimental data reported in Vázquez et al 40 Based on the satisfactory results obtained in terms of estimated fatigue life, the same law is used to simulate the experimental campaign reported in Sabelkin et al 46 The present paper is structured as follows.…”

Shot‐peened fretting fatigue components: Endurance strength and fatigue life assessment

“…Then, S is found to be at a distance from the hot spot equal to twice the averaged grain size of the material, moving along the critical plane direction. Note that the critical plane orientation is determined by the critical direction method proposed by Araújo et al, 13,14 implemented in the Carpinteri et al criterion for fretting fatigue 6,7 . Finally, the amplitude, N a , and the mean value, N m , of the normal stress related to the critical plane, and the amplitude, C a , of the shear stress lying on the critical plane are computed in S.…”

Influence of normal load frequency on fretting fatigue behaviour by a critical plane-based approach

“…In the present paper, the experimental tests carried out by Majzoobi and Abbasi [25] on an Al 7075-T6 aluminium alloy are simulated by employing a critical plane-based multiaxial criterion formulated for fretting fatigue [52][53][54]. Such a criterion was previously applied to different fretting fatigue problems, on either cylindrical-or spherical-toflat contact configurations, with a constant normal load applied to the pads.…”