Email this article 
Influence of crack depth on the stress intensity coefficient in notched and smooth plates
- Authors: Surgutanov N.A.1
-
Affiliations:
- Samara National Research University
- Issue: Vol 16, No 1 (2017)
- Pages: 176-185
- Section: MECHANICAL ENGINEERING AND POWER ENGINEERING
- URL: https://journals.ssau.ru/vestnik/article/view/4609
- DOI: https://doi.org/10.18287/2541-7533-2017-16-1-176-185
- ID: 4609
Cite item
Full Text
Abstract
The paper presents an analysis of variations in the stress intensity coefficient (SIC) in plates with different sizes of the cross-section, with and without concentrators. We also analyze the dependence of the SIC maximal value on the size of the smallest section of a plate with stress concentrator. SIC of smooth specimens and specimens with stress concentrator in the form of a semicircular notch are calculated using the ANSYS finite- element analysis program system. The static elastic problem is solved, with the strained state taken to be biaxial. The material of the plate is considered to be isotropic. The plates under consideration with a concentrator in the initial area of the crack size increase show maximum stress intensity coefficient. In plates without concentrator the SIC changes smoothly over the whole area of the crack size increase. It is established that the crack size is equal to 0.02 of the plate smallest size at the maximal value of the stress intensity coefficient. The study conducted confirms the feasibility of using the criterion of average integral residual stresses to calculate the increase of the endurance limit of surface- hardened specimens and parts with concentrators due to compressive residual stresses.
About the authors
N. A. Surgutanov
Samara National Research University
Author for correspondence.
Email: pro4nist@yandex.ru
Postgraduate Student of the Department of Strength of Materials
Russian FederationReferences
- Troshchenko V.T., Pokrovskiy V.V., Prokopenko A.V. Treshchinostoykost' metallov pri tsiklicheskom nagruzhenii [Crack resistance of metals under cyclic loading]. Kiev: Naukova Dumka Publ., 1987. 256 p.
- Kudryavtsev P.I. Nerasprostranyayushchiesya ustalostnye treshchiny [Non-propagating fatigue cracks]. Moscow: Mashinostroenie Publ., 1982. 174 p.
- Murakami Yu. Spravochnik po koeffitsientam intensivnosti napryazheniy. V. 1 [Reference book on stress intensity factors. V. 1]. Moscow: Mir Publ., 1990. 448 p.
- Pavlov V.F. The influence of a value and a distribution of residual stresses in the surface layer of a part with a concentrator on the endurance limit. Report I. Solid parts. Proceedings of Higher Educational Institutions. Маchine Building. 1988. No. 8. P. 22-26. (In Russ.)
- Pavlov V.F. The influence of a value and a distribution of residual stresses in the surface layer of a part with a concentrator on the endurance limit. Report II. Hollow parts. Proceedings of Higher Educational Institutions. Маchine Building. 1988. No. 12. P. 37-40. (In Russ.)
- Pavlov V.F., Kirpichev V.A, Vakulyuk V.S. Prognozirovanie soprotivleniya ustalosti poverkhnostno uprochnennykh detaley po ostatochnym napryazheniyam [Prediction of fatigue strength of surface hardened components by residual stresses]. Samara: Samarskiy Nauchnyy Tsentr RAN Publ., 2012. 125 p.
- Ivanov S.I., Pavlov V.F., Minin B.V., Kirpichev V.A., Kocherov E.P., Golovkin V.V. Ostatochnye napryazheniya i soprotivlenie ustalosti vysokoprochnykh rez'bovykh detaley [Residual stresses and fatigue resistance of high-strength threaded parts]. Samara: Samarskiy Nauchnyy Tsentr RAN Publ., 2015. 171 p.
- Kudryavtsev P.I., Morozova T.I. Razvitie ustalostnykh treshchin v stalyakh v svyazi s poverkhnostnym naklepom. V sbornike: «Issledovaniya po uprochneniyu detaley mashin». Moscow: Mashinostroenie Publ., 1972. P. 194-200. (In Russ.)
- Kirpichev V.A., Bukatyi A.S., Filatov A.P., Chirkov A.V. Prediction of the endurance limit of superficially strengthened details at various degree of stress concentration. Vestnik UGATU. 2011. V. 15, no. 4 (44). P. 81-85. (In Russ.)
Supplementary files
