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Fatigue Crack Growth Rate Evaluation in a Turbine Disc after Spin Rig Testing
Last modified: 2013-05-03
Abstract
This paper describes the destructive inspection analyses of cracks growing from firtree
serrations of a turbine disc spun in a spin rig facility. The cracks were initiated by
introducing EDM notches in predefined locations of the discs. Finite element based
predictions of crack growth from these notches are also reported. ZENCRACK as well as
a 2D in-house deterministic fracture mechanics software were used. Both the crack depth
and the surface crack length were predicted and correlated with the results obtained during
the spin rig testing. The results obtained are used in damage tolerance analyses of critical
components of gas turbine engines.
serrations of a turbine disc spun in a spin rig facility. The cracks were initiated by
introducing EDM notches in predefined locations of the discs. Finite element based
predictions of crack growth from these notches are also reported. ZENCRACK as well as
a 2D in-house deterministic fracture mechanics software were used. Both the crack depth
and the surface crack length were predicted and correlated with the results obtained during
the spin rig testing. The results obtained are used in damage tolerance analyses of critical
components of gas turbine engines.
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