| Autor: |
Nikitin, I. S., Nikitin, A. D., Stratula, B. A., Volkov, B. V. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2021, Vol. 2448 Issue 1, p1-7, 7p |
| Abstrakt: |
The paper deals with the problem of fatigue failure and durability of structural elements in the process of cyclic loading. Previously, such problems were solved by calculating the stress state in a cycle using a multiaxial fatigue fracture criterion. Here we consider the initiation and development of the fatigue process based on the cyclic damage model. The model contains the evolution equation for the damage function depending on stress state. The algorithm is based on a special post proceeding of a numerical solution for an elastic solid mechanics problem that can be also applied for elastic-plastic case. The normal crack opening and shear crack mechanisms are taken into account in this model. On this basis, calculations of the initiation and development of crack-like fracture zones are carried out for an aircraft structure element of a disk with a blade in a flight loading cycle. The geometry of quasi-cracks in the vicinity of the contact zone of the disk and the blade and the assessment of durability are similar to those observed in real operation. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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