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← ScienceWhich risk increases when turbine blades experience ice accretion?
A)Increased blade resonance frequency
B)Fatigue due to centrifugal stress
C)Reduced generator synchronization stability
D)Lattice defects from cyclic loading✓
💡 Explanation
Ice accretion's added mass causes cyclic stress variations and micro-cracks; because this introduces lattice defects through dislocation climb into existing grain boundaries, leading to material weakening and faster crack propagation under fatigue. Therefore, lattice defects increase, rather than resonance shifts, under centrifugal forces.
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