Edge crack problems in homogenous and functionally graded material thermal barrier coatings under uniform thermal loading

Yildirim B., ERDOGAN F.

JOURNAL OF THERMAL STRESSES, cilt.27, sa.4, ss.311-329, 2004 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 4
  • Basım Tarihi: 2004
  • Doi Numarası: 10.1080/01495730490427564
  • Dergi Adı: JOURNAL OF THERMAL STRESSES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.311-329
  • Anahtar Kelimeler: functionally graded materials, enriched elements, stress intensity factors, thermal barrier coatings
  • Hacettepe Üniversitesi Adresli: Hayır

Özet

In this study the axisymmetric crack problem for thermal barrier coatings under a uniform temperature change is considered. Modes I and II stress intensity factors and the strain energy release rate are calculated for various sizes and locations of the crack. The main variables in the problem are the material inhomogeneity parameter of the functionally graded material coating, the size and the location of the crack, and the relative dimensions of the specimen. The effect of the temperature dependence of the material properties on the stress intensity factors and the strain energy release rate is also investigated. The finite element method is used to solve the problem. The material property grading is accounted for by developing special inhomogeneous elements and the stress intensity factors are calculated by using enriched crack tip elements.