Influence of Impact-Oscillatory Loading on Fatigue Life of Aluminium Alloy 2024-T351
| Autor: | Pavlo Maruschak, Elena Zasimchuk, Andrii Pylypenko, Mykola Chausov, O.Y. Khyzhun, Janette Brezinová, Olegas Prentkovskis |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Yield (engineering) Tension (physics) Mechanical Engineering Alloy Computational Mechanics engineering.material Impulse (physics) Mechanics of Materials visual_art Aluminium alloy visual_art.visual_art_medium engineering Cyclic loading Composite material Specimen length Deformation (engineering) |
| Zdroj: | Iranian Journal of Science and Technology, Transactions of Mechanical Engineering. 46:875-884 |
| ISSN: | 2364-1835 2228-6187 |
| Popis: | Dynamic non-equilibrium processes (DNP) caused by impact-oscillatory loading affect the mechanical/structural changes and fatigue life of aluminium alloy 2024-T351 under static tension at a load frequency of 110 Hz. The main patterns of this effect are considered. Dynamic deformation eimp was chosen as the control parameter of DNP. In other words, eimp indicates a sudden increase in the specimen length when an additional impulse load is applied. It has been proven that an increase in eimp causes the occurrence of yield points on static stress–strain diagrams of alloys subjected to impact-oscillatory loading. Ranges of eimp values were found, at which fatigue life of the alloy subjected to DNP under four different modes of cyclic loading can be extended. Loading conditions that do not cause any noticeable DNP effect on the fatigue life of the alloy are analysed, and the reasons for a significant reduction in the fatigue life of the alloy are considered. Aluminium alloy 2024-T351, previously subjected to DNP, was aged in a free state for a long time to extend its cyclic life. The positive effect of DNP and ageing was estimated in this research. |
| Databáze: | OpenAIRE |
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