Assessment of fatigue life of remanufactured impeller based on FEA

Abstract

Predicting the fatigue life of remanufactured centrifugal compressor impellers is a critical problem. In this paper, the S-N curve data were obtained by combining experimentation and theory deduction. The load spectrum was compiled by the rain-flow counting method based on the comprehensive consideration of the centrifugal force, residual stress, and aerodynamic loads in the repair region. A fatigue life simulation model was built, and fatigue life was analyzed based on the fatigue cumulative damage rule. Although incapable of providing a high-precision prediction, the simulation results were useful for the analysis of fatigue life impact factors and fatigue fracture areas. Results showed that the load amplitude greatly affected fatigue life, the impeller was protected from running at over-speed, and the predicted fatigue life was satisfied within the next service cycle safely at the rated speed.

Keywords

remanufactured impeller / fatigue life / impeller failures / finite element analysis (FEA)

References

[1] Farrahi G H, Tirehdast M, Masoumi Khalil Abad E, Failure analysis of a gas turbine compressor. Engineering Failure Analysis, 2011, 18(1): 474–484

[2] Hou J F, Wicks B J, Antoniou R A. An investigation of fatigue failures of turbine blades in a gas turbine engine by mechanical analysis. Engineering Failure Analysis, 2002, 9(2): 201–211

[3] Ren W, Dong S, Xu B, Process optimization and forming repair of laser remanufacture for FV520(B) steel blade simulator. Journal of Materials Engineering, 2015, 43(1): 6–12 (in Chinese)

[4] Ren W, Dong S, Xu B, Analysis of three-dimension deformation for thin-walled blade simulator repaired by laser deposited. Transactions of the China Welding Institution, 2015, 36(6): 52–56 (in Chinese)

[5] Liu C, Liu S, Gao S, Fatigue life assessment of the centrifugal compressor impeller with cracks based on the properties of FV520B. Engineering Failure Analysis, 2016, 66: 177–186

[6] Wang R, Zhang X, Tu S, A modified strain energy density exhaustion model for creep-fatigue life prediction. International Journal of Fatigue, 2016, 90: 12–22

[7] Liu S, Liu C, Hu Y, Fatigue life assessment of centrifugal compressor impeller based on FEA. Engineering Failure Analysis, 2016, 60: 383–390

[8] Schijve J. Fatigue of Structures and Materials.Beijing: Aviation Industrial Press, 2014

[9] Kong F R, Ma J J, Kovacevic R. Numerical and experimental study of thermally induced residual stress in the hybrid laser—GMA welding process. Journal of Materials Processing Technology, 2011, 211(6): 1102–1111

[10] Ramamurti V, Subramani D A, Sridhara K. Free vibration analysis of a turbocharger centrifugal compressor impeller. Mechanism and Machine Theory, 1995, 30(4): 619–628

[11] Witek L. Experimental crack propagation and failure analysis of the first stage compressor blade subjected to vibration. Engineering Failure Analysis, 2009, 16(7): 2163–2170

[12] Zhang M, Wang W, Wang P, Fatigue behavior and mechanism of FV520B-I in ultrahigh cycle regime. Procedia Materials Science, 2014, 3: 2035–2041

[13] Zhang Y, Xu B, Wang H, An experimental analysis of fatigue behavior of welded impeller made by FV520B stainless steel in over-speed preloading process. Engineering Failure Analysis, 2016, 59: 111–121

[14] Chu Q, Zhang M, Li J. Failure analysis of impeller made of FV520B martensitic precipitated hardening stainless steel. Engineering Failure Analysis, 2013, 34(1): 501–510

[15] Wang S, Wu Y, Hua G, Study on new correction method of S-N curve for metallic material. Hot Working Technology, 2011, 40(8): 35–37 (in Chinese)

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Higher Education Press and Springer-Verlag Berlin Heidelberg