Abstract
An experimental procedure has been developed for the investigation of fatigue and crack growth resistance of materials and real compressor blades. Methods for the determination of stress intensity factors in specimens and in blades with cracks have been justified. Investigations have been performed on the influence of manufacturing residual stresses and surface defects in the form of simulators of dents, corrosion pits, and nonmetallic inclusions on the fatigue strength of steels and a titanium alloy. The characteristics of the material crack growth resistance have been studied taking into account the effect of the medium (sea water), stress ratio in a cycle, and programmed mode of loading. The authors also consider fatigue strength of newly-manufactured blades and those in operation, as well as specific features of fatigue crack propagation in blades. They have substantiated a method for predicting the life of blades with cracks.
Similar content being viewed by others
References
A. V. Prokopenko and V. N. Torgov, “Method for fatigue testing of gas-turbine engine compressor blades,”Probl. Prochn., No. 4, 107–109 (1980).
V. T. Troshchenko V. V. Pokrovskii, and A. V. Prokopenko,Crack Resistance of Metals under Cyclic Loading [in Russian], Naukova Dumka, Kiev (1987).
V. T. Troshchenko and S. M. Lyalikov, “The influence of surface defects on high-cycle fatigue of engineering materials,”Probl. Prochn., No. 1, 5–16 (1996).
A. F. Grandt and G. M. Sinclair, “Stress intensity factors for surface cracks in bending,” in:Stress Analysis and Growth of Cracks. ASTM STP 513 (1972), pp. 37–58.
A. V. Prokopenko, “Experimental determination of the stress intensity factor for cracks with a curvilinear front in complex components (gas-turbine engine blades),”Probl. Prochn., No. 4, 105–111 (1981).
P. C. Paris, “The fracture mechanics approach to fatigue,” in:Fatigue—An Interdisciplinary Approach (ed. J. C. Grosskuetz), Syracuse Univ. Press (1964).
M. Sadowsky and E. Sternberg, “Stress concentration around a triaxial ellipsoidal cavity,”J. Appl. Mech., No. 16, 149–157 (1944).
Yu. Podilchuk,Three-Dimensional Problems of Elasticity Theory [in Russian], Naukova Dumka, Kiev (1979).
V. T. Troshchenko, A. V. Prokopenko, V. N. Torgov, et al., “A study of the influence of operating time and a corrosive medium on the life of gas-turbine engine compressor blades,”Probl. Prochn., No. 4, 5–10 (1981).
V. T. Troshchenko A. V. Prokopenko, and V. N. Torogov, “Effect of a sea-salt solution on the fatigue crack growth rate in stainless steels and VT3-1 alloy,”Probl. Prochn., No. 4, 69–73 (1981).
V. T. Troshchenko and A. V. Prokopenko, “Prediction of life for GTE compressor blades in the presence of defects,” in:Vibration Strength and Reliability of Flying Vehicle Engines and Systems [in Russian], KAI, Kuibyshev, Russia, 112–124 (1981).
Additional information
Institute for Problems of Strength, National Academy of Sciences of Ukraine, Kiev, Ukraine. Translated from Problemy Prochnosti, No. 1, pp. 28–40, January–February, 1999.
Rights and permissions
About this article
Cite this article
Troshchenko, V.T., Prokopenko, A.V. Fatigue strength and life of compressor blades for marine gas turbine engines. Strength Mater 31, 18–27 (1999). https://doi.org/10.1007/BF02509736
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02509736