Foreign Objects Damage on the Leading Edge of the Blade with Centrifugal Preload

Abstract:

The influence of centrifugal prestress on the foreign object damage of engine blades was analyzed by numerical simulation. A nonlinear dynamic model for foreign object damage of blade with centrifugal prestress was established. And the dynamic relaxation method was used to obtain the initial stress and displacement field of blade in the beginning of the dynamic analysis of impact. Numerical simulations of foreign objects impacting on the leading edges of the blades under different centrifugal preloads were carried out. The results indicate that the local plastic deformation on the impact location of blade with centrifugal preload, which is produced at the moment of impact, is decreasing with the increase of the preload. The growth of crack produced on the lead edge of blade is accelerated with the preload increasing.

• Periodical: Applied Mechanics and Materials (Volumes 148-149)
• Pages: 958-962
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.148-149.958
• Online since: December 2011
• Authors: Dong Mei Yin, Zhen Xiao Li
• Keywords: Blade, Centrifugal Prestress, Crack Propagation, Dynamic Analysis, Foreign Object Damage (FOD)

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