The initiation of fatigue cracks in A 0.7% carbon steel by fretting

Analysis of Widespread Fatigue Damage in Aerospace Structures

“…While experimental research into fretting fatigue has been conduced for decades [24,33], the debate over a standard for fretting fatigue testing continues unabated, as summarized by Waterhouse [32]. Driving this discord is the difficulty in devising a single test or apparatus to capture the complex mechanical and environmental conditions driving fretting damage present in even seemingly basic mechanical systems.…”

“…The geometry of the pads can vary, ranging from spherical [5], to cylindrical [25] to flat [23]. In many configurations, an additional cyclic bulk stress is induced in the specimen under the influence of oscillatory torsional [9], bending [33] or axial [26] loading.…”

“…Wear 221 (1998) [24][25][26][27][28][29][30][31][32][33][34][35][36] Observation, analysis and prediction of fretting fatigue in 2024-T351 aluminum alloy …”

Fretting Fatigue of a Medium Carbon Steel.

“…When there is relative motion between the two surfaces , a peculiar phenomenon , known as "fretting corrosion" has been shown to occur in many instances . T his phenomenon can result in a large range of material degradation from a mere discoloration It has been shown by a number of investi gators that this fretting corrosion , when applied to surfaces undergoing fatigue deformation , can result in rapid crack initiation and accordingly decreases in fatigue resistance [13][14][15]. This decrease in fatigue resistance was thought to…”

“…The role of oxidation in the process has been disputed , with some investigators concluding that it is only mildly important [15] while others concluding that it is of prime importance [8 ,9].…”