To the computation of the fatigue life of prismatic bars under uniaxial asymmetric bending
Keywords:prismatic bars, uniaxial asymmetrical bending, high-cyclic fatigue, lifetime analysis, experimental approval
An alternative approach to solving the fatigue life computing problems for material samples and structural elements under uniaxial asymmetric cyclic loading has been considered. This approach is based on the concept of equivalent stresses, which allows the asymmetric load cycle to be reduced to the equivalent symmetric cycle for the number of fracture cycles. The structure of equivalent stresses is obtained based on the hypothesis of the existence of single isochronous ultimate stress diagrams, which are invariant with respect to the number of cycles to fracture. As basic experiments, to determine the material constants in the original equations, easily reproducible standard tests of smooth samples of the material for short-term strength and fatigue under symmetric and asymmetric bending load cycles are used. Problems of multicycle fatigue analysis of prismatic rods under uniaxial asymmetric bending, considering the influence of mean stress, stress range, and amplitude coefficient, have been solved. Satisfactory agreement of calculation results with experimental data was obtained.
Pages of the article in the issue: 144 - 147
Language of the article: Ukrainian
GOLUB, V., KRIZHANOVSKIJ, V., POGREBNYAK, A. (2004) K raschetu predelnogo sostoyaniya armirovannyh plastikov i neorientirovannyh polimerov pri asimmetrichnom mnogociklovom rastyazhenii-szhatii // Mehanika kompozitnyh materialov. 40(1). P. 65-822.
GOLUB, V., POGREBNYAK, A., KOCHETKOVA, Ye. (2006) Ustalostnaya prochnost' metallicheskikh i kompozitnykh materialov pri nagruzhenii asimmetrichnym mnogotsiklovym izgibom // Prikladna mekhanika. 42(5). P. 26-36
РAVLOVSKIY, V. (1986) Vliyaniye asimmetrii nagruzheniya na nakopleniye povrezhdeniy pri programmnykh ispytaniyakh na ustalost' stal'nykh obraztsov // Probl. prochnosti. 6. P. 55-60.
KITAGAWA, H., MOROHASHI, T. (1960) Some behaviour of structural steel subjected to corrosion fatigue (the 4th report). Influence of mean stress // Proc. of the 10th Japan Nat. Congr. Appl. Mech. P. 155-161.
How to Cite
Copyright (c) 2023 Alla V. Plashchynska, Olexander V. Romanov
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with this journal agree to the following terms:
- Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).