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Исследование корректирующей функции для расчетов долговечности при стохастическом нагружении
- Authors: Маньшин Ю.П.1, Маньшина Е.Ю.1
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Affiliations:
- Донской государственный технический университет
- Issue: No 5 (2024)
- Pages: 42-51
- Section: НАДЕЖНОСТЬ, ПРОЧНОСТЬ, ИЗНОСОСТОЙКОСТЬ МАШИН И КОНСТРУКЦИЙ
- URL: https://kazanmedjournal.ru/0235-7119/article/view/684791
- DOI: https://doi.org/10.31857/S0235711924050054
- EDN: https://elibrary.ru/NTXNCZ
- ID: 684791
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Fig. 1. Visual results of the SPD7 ALT resource calculation program: (a) — dynamic stress process and statistical characteristics; (b) — histogram of ordinates; (c) — histogram of equivalent stress amplitudes; (d) — resource calculations at the stress measurement point.
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Fig. 2. Graphical representation of the resource in logarithmic-probability coordinates.
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Fig. 3. Formation of a histogram of stress amplitudes σaj of a loading block that destroys a part after accumulation of N cycles.
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Fig. 4. Correction function aP for a number of fatigue limits of the part, MPa: 1 — σ–1D = 40; 2 — σ–1D = 83; 3 — σ–1D = 133; 4 — σ–1D = 183; 5 — σ–1D = 233; 6 — σ–1D = 283; 7 — σ–1D = 333, at different stages of maximum stress amplitudes σamax. The graph of aP for σ–1D = 383 MPa is not shown, since within the σamax scale it repeats the values of graph 7.
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Fig. 5. Correction function aP for a number of fatigue limits of the part, MPa: 1 — σ–1D = 40; 2 — σ–1D = 83; 3 — σ–1D = 133; 4 — σ–1D = 183; 5 — σ–1D = 233; 6 — σ–1D = 283; 7 — σ–1D = 333, at different stages of the ratio of maximum stress amplitudes to the fatigue limit K = σamax/σ–1D.
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