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3D-kinetic characteristics of slow fatigue crack growth in the aluminum alloy D16T
- Authors: Kol’tsoun Y.I.1, Molyavko D.P.2, Ignatovskiy A.D.1, Khibnik T.A.1
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Affiliations:
- Samara State Aerospace University
- OAO "Salut"
- Issue: Vol 13, No 5-3 (2014): Special Issue
- Pages: 148-157
- Section: ISSUE WITHOUT SECTION
- URL: https://journals.ssau.ru/vestnik/article/view/2554
- DOI: https://doi.org/10.18287/1998-6629-2014-0-5-3(47)-148-157
- ID: 2554
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Abstract
It is presented the technique based on macro structural analysis of a typical fatigue fracture of a cylindrical specimen of alloy D16T with an annular notch in bending of constructing the diagram of stress intensity coefficient defined the period growth of fatigue crack. Analytical calculation of the change in the exponent m in Peris’ formula for calculating the speed of fatigue crack growth with respect to depth a in a system with consideration of the increase in the number of cycles N of high-cycle fatigue has be established using experimental data of fatigue fractures of the aluminum alloy D16T. This made it possible to draw the kinematic diagram of a slow fatigue crack growth of D16T in a 3-dimensional coordinate system. Analyzed and numerically determine volumes are formed with the space curve the kinetic diagram of a slow fatigue crack growth. Installed a new kinetic characteristic of fatigue crack growth; i.e. the amount of work of the stress intensity coefficient used to connect parameters of low-cycle fatigue and high-cycle fatigue.
About the authors
Yu. I. Kol’tsoun
Samara State Aerospace University
Author for correspondence.
Email: koltsoun_y.i@mail.ru
Doctor of Science (Engineering)
Professor at the common engineering education department
Russian FederationD. P. Molyavko
OAO "Salut"
Email: darenok@inboxl.ru
Specialist in the department of strength
Russian FederationA. D. Ignatovskiy
Samara State Aerospace University
Email: dis164@mail.ru
Student of faculty of aircraft engines
Russian FederationT. A. Khibnik
Samara State Aerospace University
Email: tanya_hib@mail.ru
Candidate of Science (Engineering)
Assistant professor of machine design department
Russian FederationReferences
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