Three dimensional fracture analysis of FGM coatings
FUNCTIONALLY GRADED MATERIALS VIII, cilt.492-493, ss.373-378, 2005 (SCI-Expanded)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 492-493
- Basım Tarihi: 2005
- Doi Numarası: 10.4028/www.scientific.net/msf.492-493.373
- Dergi Adı: FUNCTIONALLY GRADED MATERIALS VIII
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
- Sayfa Sayıları: ss.373-378
- Orta Doğu Teknik Üniversitesi Adresli: Evet
Özet
In this study the three - dimensional surface cracking of a graded coating bonded to a homogeneous substrate is considered. The main objective is to model the subcritical crack growth process in the coated medium under a cyclic mechanical or thermal loading. Because of symmetry, along the crack front conditions of mode I fracture and plane strain deformations are assumed to be satisfied. Thus, at a given location on the crack front the crack propagation rate would be a function of the mode I stress intensity factor. A three - dimensional finite element technique for nonhomogeneous elastic solids is used to solve the problem and the displacement correlation technique is used to calculate the stress intensity factor.