Stress-strain state in "coating-substrate" system after coating stability loss induced by impact of thermal stresses

P. A. Lyukshin, S. A. Bochkareva, N. Yu Grishaeva, B. A. Lyukshin, N. Yu Matolygina, S. V. Panin

Результат исследования: Материалы для книги/типы отчетовМатериалы для конференции

Аннотация

Thermal barrier coatings (TBC) are aimed at protection of machine parts working under extremely high temperatures. One of the major problems at their exploitation is related to delamination of the coating from the substrate. In this concern, investigation of the patterns and evolution of the stress-strain state (SSS) at their interface is of particular interest. The main reasons of the delamination are associated with the distinction of thermo-physical properties (first of all, thermal expansion coefficient) of the interfaced material, as well as by the difference in heating conditions (heat supply and abstraction). The latter is of particular importance when the transient regimes take place under the heat impact, i.e. the TBC becomes rapidly heated, while the substrate has much lower temperature. In order to analyze and simulate the processes that give rise to the delamination, a number of problems is to be solved. At the first stage, the temperature variation induced by the thermal impact both in the coating and the substrate is to be determined. At the second stage, the distribution of the Stress Strain State (SSS) in the coating and the substrate are to be found. Based on the values of the calculated stresses, the stability loss patterns of the coating might be revealed. In doing so, the latter is regarded as a plate rested on Winkler elastic foundation. By defining the plate deflections in concern of its interaction with the substrate, the distribution of the SSS parameters at the contact surface can be found. Finally, the conditions to determine the TBC delamination from the substrate are estimated.

Язык оригиналаАнглийский
Заголовок главной публикацииAdvanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
Подзаголовок главной публикацииProceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
ИздательAmerican Institute of Physics Inc.
Том1783
ISBN (электронная версия)9780735414457
DOI
Статус публикацииОпубликовано - 10 ноя 2016
СобытиеInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016 - Tomsk, Российская Федерация
Длительность: 19 сен 201623 сен 2016

Конференция

КонференцияInternational Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016
СтранаРоссийская Федерация
ГородTomsk
Период19.9.1623.9.16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Цитировать

Lyukshin, P. A., Bochkareva, S. A., Grishaeva, N. Y., Lyukshin, B. A., Matolygina, N. Y., & Panin, S. V. (2016). Stress-strain state in "coating-substrate" system after coating stability loss induced by impact of thermal stresses. В Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016: Proceedings of the International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2016 (Том 1783). [020142] American Institute of Physics Inc.. https://doi.org/10.1063/1.4966435