Keywords creep, fatigue, turbines. Keyphrases crack nucleation, creep fatigue. Gas Turbines Description Foreign object damage occurs when small hard objects such as stones are ingested by aircraft engines. In many cases the resulting damage causes a significant reduction in the fatigue life of the blade. Experiments have been carried out using the high-speed gas guns at Oxford to introduce representative damage to the leading edges of blades.
Work is currently underway to develop a methodology for the prediction of residual fatigue life.
Research D. Nowell , S. Oakley. Keywords aero-engines, impact. Keyphrases impact damage on aero-engines. Research in this area has been taking place in Oxford for several years. At present, interest centres around fretting on the dovetail roots of gas turbine fan blades.