| Citation: | MENG Weihua, ZHANG Zhiyi, LI Jian, et al. Turbine blade shedding predictive analysis method considering plastic instability criterion[J]. Journal of Aerospace Power, 2026, 41（1）：20240700 doi: 10.13224/j.cnki.jasp.20240700
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To meet the integrity requirements of the turbine rotor design on loss-of-load defined by the engine airworthiness regulation CCAR33.27, aero-engines usually adopt an overspeed protection design for turbine blade shedding to avoid non-containment issues under disk burst. Therefore, accurate prediction of turbine blade shedding speed is crucial in the overspeed protection design. According to the visco-elasto-plastic constitutive equations and the virtual work principle, the approach to predict the turbine blade shedding from the finite element analysis results was studied, and the corresponding visco-elasto-plastic instability criteria were provided. It was demonstrated through a practical application example that the proposed turbine blade shedding speed prediction considering visco-elasto-plastic instability criteria had higher precision. Compared with the traditional methods, the proposed method reduced the maximum prediction error from 10.35%, 7.64% to 2.87%. In addition, the prediction method based on visco-elasto-plastic instability criteria can be widely used in engineering applications.
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