AN EVALUATION OF PARTS’ FATIGUE RESISTANCE AFTER SURFACE THERMO CHEMICAL MACHINING


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Abstract

In order to raise a fatigue resistance the calculation-experimental method of parts’ surface thermo chemical machining efficiency has been carried out. The employment of two types of reference specimens in experiments has been substantiated. The employment of smooth reference specimens for a determination of residual stresses in a surface layer and of corset reference specimens for fatigue tests has been recommended. The results of experimental study of two types of thermo chemical machining (cementation and nitriding) influence on a fatigue resistance of corset specimens made of high-strength  allows ВКС-5 и ВНС-17 have been used in the work. .  The calculations of the study have been carried out by the Finite Elements Modeling method using the calculation complexes ANSYS and PATRAN/NASTRAN. The residual strained state modeling is carried out by thermo elasticity method. On grounds of conducted calculation it’s been stated that an axial residual stresses distribution in a dangerous (smallest) section of a corset specimen doesn’t practically differ from a similar distribution in smooth specimens. An endurance limit increment due to corset specimens hardening was determined with use of the average integral residual stresses criterion. Carried out results let also maintain that the optimal regimes of thermo chemical machining are the regimes under which average integral residual stresses are maximum.

About the authors

Vyacheslav Petrovich Sazanov

Samara National Research University

Author for correspondence.
Email: sazanow@mail.ru

candidate of technical science, associate professor of strength of materials department of Samara National Research University (Samara University).

Russian Federation, 34, Moskovskoe shosse, Samara, 443086, Russian Federation

Vladimir Stepanovich Vakulyuk

Samara National Research University

Email: vak.v.s@yandex.ru

doctor of technical sciences, professor of strength of materials department of Samara National Research University (Samara University)

Russian Federation, 34, Moskovskoe shosse, Samara, 443086, Russian Federation

Ol'ga Yur'evna Semenova

Samara National Research University

Email: ser-alv@yandex.ru

candidate of technical science, associate professor of further mathematics department of Samara National Research University (Samara University)

Russian Federation, 34, Moskovskoe shosse, Samara, 443086, Russian Federation

Valentin Valerievich Lunin

Samara National Research University

Email: sopromat@ssau.ru

candidate of technical science, assistant lecturer of strength of materials department of Samara National Research University (Samara University)

Russian Federation, 34, Moskovskoe shosse, Samara, 443086, Russian Federation

Andrej Viktorovich Pismarov

Samara National Research University

Email: sopromat@ssau.ru

postgraduate student of strength of materials department of Samara National Research University (Samara University)

Russian Federation, 34, Moskovskoe shosse, Samara, 443086, Russian Federation

References

  1. Pavlov, V.F., (1986) O svyazi ostatochnyh napryazhenij i predela vynoslivosti pri izgibe v usloviyah kon-centracii napryazhenij [On connection between residual stresses and endurance limit under bending in stresses con-centration conditions]. Izvestiya vusov. Маshinostroeniye [Universities News. Mechanical Engineering], no. 8, pp. 29-32. (in Russian).
  2. Pavlov, V.F., (1988) Vliyanie na predel vynoslivosti velichiny i raspredeleniya ostatochnyh napryazhenij v poverhnostnom sloe detali s koncentratorom. Soobshchenie I. Sploshnye detali [The influence of residual stresses in a part with a concentrator surface layer value and distribution on the endurance limit. Report 1. Solid parts]. Izvestiya vusov. Маshinostroeniye [Universities News. Mechanical Engineering], no. 8, pp. 22-26. (in Russian).
  3. Pavlov, V.F., Kirpichev, V.A., Vakulyuk, V.S., (2012) Prognozirovanie soprotivleniya ustalosti poverhnostno uprochnyonnyh detalej po ostatochnym napryazheniyam [The prediction of surface hardened parts fatigue resistance by residual stresses]. Samara: Izdatel'stvo SNC RAN [Samara: Samara scientific centre Publishing House of the Rus-sian Academy of Sciences], 125 pp. (in Russian).
  4. Peterson, R.Е., (1977) Koefficienty koncentracii napryazhenij [Stresses concentration coefficients]. M.: Mir [М.: Publishing House «МIR»], 304 pp. (in Russian).
  5. Sazanov, V.P., Kirpichev, V. A., Vakulyuk, V.S., Pavlov, V.F., (2015) Opredelenie pervonachal'nyh defor-macij v uprochnyonnom sloe cilindricheskoj detali metodom konechno-ehlementnogo modelirovaniya s ispol'zovaniem raschyotnogo kompleksa PATRAN/NASTRAN [The determination of initial deformations in the sur-face layer of a cylindrical part by the finite elements modeling method with use of the calculation program complex PATRAN/NASTRAN]. Vestnik UGATU [Ufa State Aviation Technical University bulletin], vol. 19, no. 2 (68), pp. 35-40. (in Russian).
  6. Sazanov, V.P., Chirkov, A.V., Semenova, O.Yu., Ivanova, A.V., (2012) Modelirovanie ostatochnogo naprya-zhyonnogo sostoyaniya detali v usloviyah koncentracii napryazhenij s ispol'zovaniem programmnogo kompleksa PATRAN/ NASTRAN [The residual strain state of parts modeling under stress concentration conditions using the calculation program complex NASTRAN/PATRAN]. Vestnik SamGTU [Samara State Technical University bulletin. Part: technical sciences], no. 1 (33), pp. 106-114. (in Russian).
  7. Pavlov, V.F., Kirpichev, V. A., Vakulyuk, V.S., Sazanov, V.P., (2014) Vliyanie poverhnostnogo uprochneniya na predel vynoslivosti cilindricheskih detalej razlichnogo diametra [The influence of surface hardening on the en-durance limit of cylindrical parts of various diameter]. Izvestiya vusov [Universities News. Aviation technique], no. 3, pp. 324-326. (in Russian).
  8. Timoshenko, S.P., Goodier G., (1979) Teoriya uprugosti [Elastic theory]. Moscow: Science, 341 pp. (in Rus-sian).
  9. Ivanov, S.I., (1971) K opredeleniyu ostatochnyh napryazhenij v cilindre metodom kolec i polosok. Ostato-chnye napryazheniya [On determination of residual stresses in cylinder by rings-and-stripes method. Residual stress-es]. Kuibyshev: KuAI [Kuibyshev Aviation Institute], issue 53. pp. 32-42. (in Russian).
  10. Sazanov, V.P., Semenova, O.Yu., Kirpichev, V. A., Vakulyuk, V.S. Matematicheskoe modelirovaniye pervo-nachal'nyh deformacij v poverhnostno uprochnyonnyh detalyah pri vybore obraztza- svidetelya. [Mathematic mod-eling of initial deformations in surface hardened parts under the choice of a reference specimen]. Vestnik UGATU. 2016 [Ufa State Aviation Technical University bulletin]. Vol. 20, No. 3 (73), pp. 31-37. (in Russian).

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Copyright (c) 2022 Sazanov V.P., Vakulyuk V.S., Semenova O.Y., Lunin V.V., Pismarov A.V.

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Journal of Dynamics and Vibroacoustics

ISSN 2409-4579 (Online)

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