TY - JOUR
TI - Interfacial crack behavior in the stationary temperature field conditions
AU - Djoković Jelena M
AU - Nikolić Ruzica R
AU - Živković Katarina Z
JN - Thermal Science
PY - 2014
VL - 18
IS - 11
SP - 169
EP - 178
PT - Article
AB - The brittle coatings, made of different materials, when subjected to elevated  temperatures and in the heat exchange conditions, are susceptible to  delamination. Those coatings, as well as thin films, can be used for various  thermo insulating deposits, e.g. in turbines of thermal power plants., In  layers made of different materials, due to the environmental temperature  change, thermal stresses appear as a consequence of a difference in their  thermal expansion coefficients. In this paper driving forces were analyzed  causing delamination of one layer from the other, i.e. the interfacial  fracture in the two-layered, bimaterial sample. This analysis was limited to  considering the sample behavior when exposed to the stationary temperature  field. The energy release rate G, which is the driving force for this  interfacial fracture, is changing with temperature and that variation is  increasing with increase of the temperature difference between the  environment and the sample. Analysis of this relation can be used to predict  the maximal temperature difference, which the two-layered sample can be  subjected to, without appearance of delamination between layers.