Conclusions
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1.
In determining stresses in a compressor wheel using the method of N. A. Zavartseva it is necessary to take into consideration the stresses caused by a concentrator in the fillets and the axial stresses in the hub.
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2.
The calculated values of the strength safety factor based on the failure speed are an average of 15% higher than the experimental.
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3.
Turbocompressor wheels of AL4M alloy are 3–4% stronger than those of V124 material despite the fact that σT of the first is 12% lower than that of the second. This may be explained by the higher ductility of AL4M alloy, which leads to a redistribution of the stresses at the more stressed points.
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Literature Cited
I. A. Birger, B. F. Shorr, and R. M. Shneiderovich, The Design of Machine Parts for Strength [in Russian], Mashinostroenie, Moscow (1967).
N. A. Zavartseva, “The design of radial turbomachine discs for strength,” Trudy NAMI, No. 55 (1963).
Additional information
Institute of Strength of Materials, Academy of Sciences of the Ukrainian SSR, Kiev, Penza. Translated from Problemy Prochnosti, No. 1, pp. 92–97, January, 1976.
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Kozlov, I.A., Shlik, L.R., Gorodetskii, V.N. et al. Strength of compressor wheels of low-ductility alloys. Strength Mater 8, 91–95 (1976). https://doi.org/10.1007/BF01528224
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DOI: https://doi.org/10.1007/BF01528224