| Autor: |
Osinnii Aleksei, Chigarev Anatoli, Bublikov Jury, Mosyanov Mikhail, Kekalo Anton |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
EPJ Web of Conferences, Vol 248, p 04010 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
2100-014X |
| DOI: |
10.1051/epjconf/202124804010 |
| Popis: |
The paper proposes methods to predict the reliability of a multilayered coating based on a model with independently (sequentially) degrading layers. For the mathematical description of the process of crack penetration into the depth of a layered solid body from the free surface with certain roughness, the propagation of a crack tip into a layer adjacent to the free boundary of the coating is considered. This stochastic process is described through the specification of all multipoint probability distributions (densities), and it represents a Markov process. A mathematical model, described by equations of the parabolic type, is proposed to describe the above-mentioned process. Based on the above model, graphs are constructed to describe the change in the time of the crack propagation through a layer depending on the surface roughness and the ultimate strength (ductility) of the coating. The crack growth rate will be in the range from 10-6 mm/s (when the surface roughness is low) to 10-4 mm/s (when the surface roughness is high). |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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