Fretting Fatigue

alternating stress aluminium alloy anodised applied austenitic bending carbon steel coatings coefficient of friction components compressive constant amplitude loading contact area contact pressure contact stress contact surfaces corrosion fatigue crack growth crack initiation crack propagation crack propagation curves crack rate due to fretting edge effect of fretting environment fatigue limit fatigue tests fracture mechanics frequency fretted surface fretting cycles fretting damage fretting fatigue cracks fretting fatigue failures fretting fatigue strength fretting pads fretting scar frictional forces Hoeppner increased interface length correction material maximum mean stress MN m² molybdenum molybdenum disulphide number of cycles occurs pad span peak plate potential push-pull room temperature round assembly sharp assembly shear stress shot peening shown in Fig shows sliding slip amplitude slip region sodium chloride strength reduction stress concentration stress field stress intensity factor stress levels tangential force tensile stress titanium alloys torsional variable amplitude loading Waterhouse