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|Titolo:||An overview of optimized inspection plans for high speed axles|
|Autori interni:||CARBONI, MICHELE|
|Data di pubblicazione:||2014|
|Abstract:||Considering hollow railway axles for high-speed applications, an effective optimization of the maintenance non-destructive (NDT) inspections is mandatory to guarantee a safe service. Since observed failures are typically connected to crack propagation phenomena originated by corrosion-fatigue pits or ballast impacts, inspection intervals can be defined, for a given application, by a “damage tolerant” approach based on fracture mechanics concepts and the reliability (“Probability of Detection” curve) of the adopted NDT techniques. Starting from this background, the present paper describes a methodology for the optimization of inspection plans for high-speed axles. First, the design procedure for axles is presented along with the inspection design approach. The latter is here based on the innovative definition of “Model-Assisted Probability of Detection” curves considering a suitable, and cheaper, mix of experimental and numerical results. Then, the boreprobe is described as the fundamental system of an automatic and mechanised procedure, so to diminish the human errors, for inspecting hollow axles. Finally, the derivation of optimised inspection intervals is explained.|
|Appare nelle tipologie:||04.1 Contributo in Atti di convegno|
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