Archive > 2013 > August 2013 > Preventing Fretting Fatigue in Blade Dovetail Roots by Modifying Geometry of Contact Surfaces

Preventing Fretting Fatigue in Blade Dovetail Roots by Modifying Geometry of Contact Surfaces - August 2013

Stephen Marsh

The article "Preventing Fretting Fatigue in Blade Dovetail Roots by Modifying Geometry of Contact Surfaces" appeared in the August 2013 issue of Power Transmission Engineering.

Summary
Dovetails, gears and splines have been widely used in aero engines where fretting is an important failure mode due to loading variation and vibration during extended service. Failure caused by fretting fatigue becomes a prominent issue when service time continues beyond 4,000 hours. In some cases, microslip at the edge of a contact zone can reduce the life by as much as 4060 percent.

Keywords
fretting, failure, fatigue

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