Stress-Strain State in a Buckled Thermal Barrier Coating on an Elastic Substrate

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

Research output: Contribution to journalArticle

Abstract

The paper analyzes the stress-strain state of a thermal barrier coating buckled on an elastic substrate under thermal shock. For the analysis, the stability loss of an orthotropic plate on an elastic substrate (Winkler foundation) is modeled using the Euler method on the assumption that compressive stresses arise in the plate as it expands on heating while the substrate remains cold and dimensionally stable. The deflection amplitude and stresses in the heated plate are determined, and the stress-strain state in the substrate is estimated by solving a plane elastic problem with displacement boundary conditions. The data suggest that both compressive and tensile stresses arise at the coating-substrate interface since the coating becomes unstable and that extrusion and intrusion zones appear in the substrate, showing their chessboard distribution in the plane strain case.

Original languageEnglish
Pages (from-to)498-507
Number of pages10
JournalPhysical Mesomechanics
Volume21
Issue number6
DOIs
Publication statusPublished - 1 Nov 2018

Fingerprint

Thermal barrier coatings
coatings
Substrates
Compressive stress
orthotropic plates
Orthotropic plates
Coatings
thermal shock
plane strain
Thermal shock
tensile stress
intrusion
Tensile stress
Extrusion
coating
deflection
Boundary conditions
boundary conditions
Heating
heating

Keywords

  • stability loss
  • thermal barrier coatings
  • thermal shock

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Surfaces and Interfaces

Cite this

Stress-Strain State in a Buckled Thermal Barrier Coating on an Elastic Substrate. / Lyukshin, P. A.; Lyukshin, B. A.; Matolygina, N. Yu; Panin, S. V.

In: Physical Mesomechanics, Vol. 21, No. 6, 01.11.2018, p. 498-507.

Research output: Contribution to journalArticle

Lyukshin, P. A. ; Lyukshin, B. A. ; Matolygina, N. Yu ; Panin, S. V. / Stress-Strain State in a Buckled Thermal Barrier Coating on an Elastic Substrate. In: Physical Mesomechanics. 2018 ; Vol. 21, No. 6. pp. 498-507.
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