Email this article THE INFLUENCE OF CUT’S DEPTH ON RESIDUAL STRESSES DISTRIBUTION AND AN ENDURANCE LIMIT OF SPECIMENS UNDER SURFACE HARDENING
- Authors: Pavlov V.F.1, Vakulyuk V.S.1, Sazanov V.P.1, Pilipiv O.M.1, Matveeva K.F.1
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Affiliations:
- Samara National Research University
- Issue: Vol 7, No 4 (2021)
- Pages: 6-10
- Section: Articles
- URL: https://dynvibro.ru/dynvibro/article/view/10390
- DOI: https://doi.org/10.18287/2409-4579-2021-7-4-6-10
- ID: 10390
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Abstract
The influence of cut’s depth on residual stresses distribution and an endurance limit under bending of hollow cylindrical specimens made of steel 20 with external diameter 50 mm and interior diameter 40 mm after outstripping superficial plastic deforming by roller strengthening of two regimes has been examined. It’s been stated that the value of compressive residual stresses in a dangerous section of specimens decreases on cut’s depth increase. As a result, an endurance limit increment of hardened specimens with cuts diminishes. In order to preserve the effect of hardening by increasing the endurance limit under outstripping superficial plastic deforming with an increase in a cut’s depth, it is necessary to increase the thickness of a smooth part with compressive residual stresses layer. It’s been shown that in order to estimate the increase in the endurance limit of hardened specimens, one should use not residual stresses at the bottom of a cut, but average integral residual stresses through the part’s dangerous section surface layer thickness that equal a critical depth of a non-propagating fatigue crack.
About the authors
Valentin Fyodorovich Pavlov
Samara NationalResearch 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).
Romania, 34, Moskovskoe shosse, Samara, 443086, Russian FederationVladimir Stepanovich Vakulyuk
Samara NationalResearch 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 FederationVyacheslav Petrovich Sazanov
Samara NationalResearch 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 FederationOleg Mihajlovich Pilipiv
Samara NationalResearch University
Email: pilipivoleg@mail.ru
postgraduate student of strength of materials department of Samara National Research University (Samara University)
Russian Federation, 34, Moskovskoe shosse, Samara, 443086, Russian FederationKarina Fyodorovna Matveeva
Samara NationalResearch University
Email: dakotastr@mail.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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