Finite element analysis of fretting wear under variable coefficient of friction and different contact regimes

Numerical prediction of fretting fatigue crack trajectory in a railway axle using XFEM

Crystal orientation effect on fretting fatigue induced geometrically necessary dislocation distribution in Ni-based single-crystal superalloys

Fretting wear characterization by point contact of Nickelsuperalloy interfaces

Fretting wear behaviour of machined layer of nickel-based superalloy produced by creep-feed profile grinding

High-frequency, high-temperature fretting-fatigue experiments

Fretting is a structural damage mechanism observed when two nominally clamped surfaces are subjected to an oscillatory loading. A critical location for fretting induced damage has been identified at the blade/disk and blade/damper interfaces of gas turbine engine turbomachinery and space propulsion components. The high-temperature, high-frequency loading environment seen by these components lead to severe stress gradients at the edge-of-contact. These contact stresses drive crack nucleation and propagation in fretting and are very sensitive to the geometry of the contacting bodies, the contact loads, materials, temperature, and contact surface tribology (friction). To diagnose the threat that small and relatively undetectable fretting cracks pose to damage tolerance and structural integrity of in-service components, the objective of this work is to develop a well-characterized experimental fretting rig capable of investigating fretting behavior of advanced aerospace alloys subjected to load and temperature conditions representative of such turbomachinery components.

High-Frequency, High-Temperature Fretting Experiments

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High-frequency, high-temperature fretting-fatigue experiments

High-Frequency, High-Temperature Fretting Experiments