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 journalArticlepeer-review

5 Citations (Scopus)

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

Keywords

  • stability loss
  • thermal barrier coatings
  • thermal shock

ASJC Scopus subject areas

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

Fingerprint Dive into the research topics of 'Stress-Strain State in a Buckled Thermal Barrier Coating on an Elastic Substrate'. Together they form a unique fingerprint.

Cite this