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Paper Title: Effect of fretting fatigue parameters on fir-tree joint of aero-engine blade disc interface
Authors Name: Arun Khot , A. Bharatish , P. V. Srihari
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Published Paper Id: IJNRD1710003
Published In: Volume 2 Issue 10, October-2017
Abstract: In gas turbine engine, one of the major failure is due to fretting fatigue at turbine blade/disc joints. Fretting fatigue generally leads to the degradation of fatigue strength of material due cyclic micro-slip between contacting surfaces. The present study focuses on achieving optimal blade/disc parametric combination in order to minimize stress distribution and effect of fretting fatigue based on Response Surface Method (RSM). In this work most effective geometrical parameters like bottom flank angle, skew angle and number teeth are considered as variables affecting on stress distribution such as von-mises stress, maximum principle stress, shear stress, and contact pressure. Second-order quadratic models are developed for all responses, using central composite design. The developed models are used to determine the optimum parameters. These optimized geometrical parameters are validated as the response values are in reasonable agreement with the predicted values.
Keywords: Fir-tree assembly, Fretting Fatigue, Finite Element, Central composite design, Optimization
Cite Article: "Effect of fretting fatigue parameters on fir-tree joint of aero-engine blade disc interface", International Journal of Novel Research and Development (, ISSN:2456-4184, Vol.2, Issue 10, page no.10-14, October-2017, Available :
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