Inspection scheduling based on reliability updating of gas turbine welded structures

• Main Authors: Armando Coro, Mikel Abasolo, Josu Aguirrebeitia, LN López de Lacalle
• Format: Article
• Language: English
• Published: SAGE Publishing 2019-01-01
• Series: Advances in Mechanical Engineering
• Online Access: https://doi.org/10.1177/1687814018819285

This article presents a novel methodology for the inspection scheduling of gas turbine welded structures, based on reliability calculations and overhaul findings. The model was based on a probabilistic crack propagation analysis for welds in a plate and considered the uncertainty in material properties, defect inspection capabilities, weld geometry, and loads. It developed a specific stress intensity factor and an improved first-order reliability method. The proposed routine alleviated the computational cost of stochastic crack propagation analysis, with accuracy. It is useful to achieve an effective design for manufacturing, to develop structural health monitoring applications, and to adapt inspection schedules to airplane fleet experience.