Studying the Possibility of the Destruction Control of Machine Parts by Applying Directed Sharp Concentrators
International Journal of Industrial and Manufacturing Systems Engineering
Volume 5, Issue 4, December 2020, Pages: 39-45
Received: Nov. 5, 2020;
Accepted: Dec. 4, 2020;
Published: Dec. 16, 2020
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Natallia Yankevich, Centre for System Analysis and Strategic Research, National Academy of Sciences of Belarus, Minsk, Republic of Belarus
The problem of preventing fatigue failure is highly relevant in all branches of engineering, especially for such structures, the failure of parts in which can lead to accidental effects. But this problem is becoming incredibly important recently due to the need of intensively increasing of the service life and reliability of machines during operation. As a rule, particular attention is paid to the study of the areas in the details with the sharp change in share and size, in which local zones with stress changes exist, leading to the appearance of cracks and, ultimately, to the destruction of these parts. The most extensive research in this area has been performed on various samples. However, the obtained results do not allow to describe the stress state and the stress concentrators with the help of analytical dependencies, especially in the case of sharp cuts and when superposition of stress concentrations, because they do not take into account the scale factor, state of material, etc. In particular, sharp depressions and small cuts (scratches), which do not reduce the strength of the material according to their concentration coefficients, are of special scientific interest, as well as the development of methods for controlling the destruction process. The usage of numerical methods (in particular, the finite element method) significantly expands the possibilities of analysis of stresses in the concentrators of samples and parts. However despite the results achieved, it is considered that it is still difficult to obtain a satisfactory solution for the stress field in the part’s concentrator, taking into account local design features. The article examines the stress state and fatigue resistance under bending loading of the on specially developed physical models of a crankshaft produced with different technologies, having a sharp decrease in the radii of fillets. Models with applied sharp concentrators of various geometries were tested. The performed studies allow to conclude that research in this direction is promising, since new knowledge about stress concentrators and their effect on the fatigue strength of full-scale parts can open up new reserves for increasing the fatigue strength of full-scale structures.
Studying the Possibility of the Destruction Control of Machine Parts by Applying Directed Sharp Concentrators, International Journal of Industrial and Manufacturing Systems Engineering.
Vol. 5, No. 4,
2020, pp. 39-45.
Copyright © 2020 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
A. J. Durelli, “Stress Concentrations” in vol. 7, G. C. Sih, Eds. Springer, 1981, pp. 1-162.
A. I. Lurie, Theory of Elasticity. Springer Publishers, 2005, pp. 243-407.
M. P. Savruk, A. Kazberuk. Stress Concentration at Nodes, 2017, pp. 1-56.
A. V. Andreev, Engineering Methods for Determining Stress Concentration in the Machine’s Parts: Mechanical Engineering, 1976, 76 p.
MP. Savruk, A. Kazberuk, Stress Concentration at Nodes, 2017, p. 79- 137.
A. K. Preiss, G. A. Degteva, M. G. Korneenkova, Stress Definition in the Details of Variable Diameter under Bending According to Polarization-Optical Measurements, Methods of research by polarization-optic measurements in constructions. M.: Science, 1976, p. 111-117.
Zirka A. I., Lavren’uk V. I., Savchenko V. I. (1977). Stress Concentration near the Stepped Holes in the Plates of Medium Thickness, Problems of the Strength 1: 66-67.
R. Peterson, Stress Concentration Coefficients, M.: Mir, 1977, 305 p.
W. D. Pilkey, D. F. Pilkey, Peterson’s Stress Concentration Factors, WILLEY, 2007, 555 p.
V. G. Kogaev, N. A. Makhutov, A. P. Gusenkov, Calculations of Machine Parts and Structures for Strength and Durability: a Reference Book, M.: Engineering, 1985, 224 p.
Troshchenko V. T., Khamaza L. A., Mishchenko Ju. D. (1978). Investigation of the Fatigue Strength of Specimens with Stress Concentrators Taking into Account Inelastic Cyclic Deformations, Problems of the Strength 4: 13-16.
Kuz’menko V. A., Trapezin A. G., Kruk B. Z., Pismennyi N. N. (1980). To the Analysis of the Stress State of Stepped Specimens Used in Fatigue Bending Tests, Problems of the Strength 12: 45-50.
Weiss V. Analysis of Destruction in the Conditions of Stress Concentration, in “Destruction”, M.: Mir, Vol. 3, pp. 263-302.
Kudriavtsev I. V., Naumchenkov N. E. (1978). Fatigue Resistance Characteristics of Steel 25 due to Absolute Dimensions and Stress Concentration, Problems of the Strength 4: 17-22.
Panfilov Ju. A. (1984). On the question of the effect of stress concentration on the fatigue resistance of structural steel, Problems of the Strength 7: 84-87.
Mustafin Ch. G. (1976). Approximate Calculation of the Stress and Strains Concentration in the Plastic Region during Creep, Problems of the Strength 5: 78-81.
Natseiko M. M., Pokhmursky V. I., Filimonov G. N. (1980) Influence of the Stress Concentration on the Scale Effect in Fatigue Resistance of Medium-Carbon and Low-Alloy Steels, Problems of the Strength 3: 27-31.
P. I. Kudriavtsev, Non-propagating fatigue cracks, M.: Engineering, 1982, 171 p.
Kogaev V. P., Galperin M. Y. (1982). Estimation of Critical Radii of curvature in the Stress Concentration Zones, Problems of the Strength 3: 21-24.