FINITE-ELEMENT ANALYSIS OF A THERMALLY LOADED INTERFACE CRACK IN A CERAMIC COATING

The finite element method is used to model the thermally induced stres ses in an interface crack between a ceramic coating and a metallic sub strate, This analysis uses finite heat transfer across the crack flank s, and the results indicate that modeling of the heat transfer across the crack faces-is important to the evaluation of stresses near the cr ack tip. The complex stress intensity factor magnitude and phase angle were determined using several techniques, including the local colloca tion technique, all of which were found to be in reasonable agreement. The results show that the local collocation technique can be used suc cessfully in the evaluation of stress intensity factors of bimaterial interface cracks. (C) 1998 Elsevier Science Ltd.