Yayınlanmış 1 Ocak 2008
| Sürüm v1
Konferans bildirisi
Açık
Three dimensional analysis of periodic cracking in FGM coatings under thermal stresses
Oluşturanlar
- 1. Middle E Tech Univ, Dept Engn Mech, TR-06531 Ankara, Turkey
- 2. Hacettepe Univ, Dept Engn Mech, Ankara 06532, Turkey
- 3. Lehigh Univ, Dept Mech Engn & Mech, Bethlehem, PA 18015 USA
Açıklama
A three dimensional finite element method is used to examine periodic surface cracking problem in a functionally graded coating subjected to transient thermal loads. The ceramic/metal FGM coating is assumed to contain periodic semi-elliptical cracks and to be perfectly bonded to a homogeneous substrate. The composite structure is subjected to transient residual/thermal stresses. Temperature and displacement fields are computed using a three dimensional finite element approach. Finite element models are created by considering a unit cell in the periodic structure. Mode I stress intensity factors are evaluated by means of the displacement correlation technique (DCT). Presented results illustrate the influence of crack periodicity on the transient behavior of the stress intensity factors.
Dosyalar
bib-95837f1f-4037-4dcf-9a14-4f76b26361e9.txt
Dosyalar
(176 Bytes)
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