Email this article AN EVALUATION OF PARTS’ FATIGUE RESISTANCE AFTER SURFACE THERMO CHEMICAL MACHINING
- Authors: Sazanov V.P.1, Vakulyuk V.S.1, Semenova O.Y.1, Lunin V.V.1, Pismarov A.V.1
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Affiliations:
- Samara National Research University
- Issue: Vol 7, No 4 (2021): 20.12.2021
- Pages: 11-19
- Section: Articles
- Published: 20.12.2021
- URL: https://dynvibro.ru/dynvibro/article/view/10391
- DOI: https://doi.org/10.18287/2409-4579-2021-7-4-11-19
- ID: 10391
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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 FederationVladimir 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 FederationOl'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 FederationValentin 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 FederationAndrej 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 FederationReferences
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