Email this article AN INFLUENCE OF ROLLER STRENGTHENING ON MULTCYCLIC FATIGUE OF SPECIMENS WITH CUTS OF VARIOUS DEPTH AND A PRESSURIZED HUB
- Authors: Pavlov V.F.1, Sazanov V.P.1, Vakulyuk V.S.1, Tumanov D.V.1, Bogdanova I.V.1
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Affiliations:
- Samara National Research University
- Issue: Vol 8, No 1 (2022)
- Pages: 6-11
- Section: Articles
- URL: https://dynvibro.ru/dynvibro/article/view/10541
- DOI: https://doi.org/10.18287/2409-4579-2022-8-1-6-11
- ID: 10541
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Abstract
The influence of roller strengthening on a residual stresses distribution and multicyclic fatigue of solid cylindrical specimens of 50 mm diameter made of steel 20 with cuts of various depths and a pressurized hub has been examined. As a result, an endurance limit of roller strengthened specimens diminishes. In order to preserve the effect of hardening with a cut’s depth increase, it’s necessary to increase the thickness of a layer with compressive residual stresses. Surface hardening influence on an endurance limit of specimens has been estimated by two criteria: axial residual stresses on a concentrator’s surface and average integral residual stresses, calculated through the dangerous section’s surface layer thickness that equal a critical depth of a non-propagating fatigue crack. It’s been stated that it’s more reasonable to use the average integral residual stresses criterion for an evaluation of roller strengthening influence on an endurance limit of specimens with cuts of various depth and a pressurized hub.
About the authors
Valentin Fyodorovich Pavlov
Samara National Research University
Author for correspondence.
Email: pavlov.vf@ssau.ru
doctor of technical sciences, head of strength of materials department of Samara National Research University (Samara University)
Russian Federation, 34, Moskovskoe shosse, Samara, 443086, Russian FederationVyacheslav Petrovich Sazanov
Samara National Research University
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 FederationDmitrij Vyacheslavovich Tumanov
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 FederationIrina Vyacheslavovna Bogdanova
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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