The local collocation technique was used to evaluate the stress intensity factor of the interfacial crack. Combined with finite element method, it is used to compute the stress intensity factor of the interfacial crack between the ceramic coating and bond coating of thermal barrier coating under tensile load and thermal load. The stress intensity factor of the interfacial crack is complex, it includes the magnitude and phase angle, so the method to determine the K factor is different from traditional methods that are used to determine the K factors of homogeneous material. Finally, the results are discussed.
Williams M L��The stresses around a fault or crack in dissimilar media[J]��Bulletin of the Seismological Society of America, 1959,49(2):199~204��
Takeuchi Y R,Kokini K.Thermal fracture of multilayer ceramic thermal barrier coatings[J].J Engineering Gas Turbines Power Transactions of the ASME.1994,116:266-271
Oneil David A, Wayne Steven F. Numerical simulation of fracture in coated brittle materials subjected to tribo-contact[J].J Engineering Materials and Technology.1994,116:471-478
Dattaguru B,Venkatesha K S,Ramamurthy T S,��et al��.Finite element estimates of strain energy release rate components at the tip of an interface crack under mode I loading[J].Engineering Fracture Mechanics.1994,49(3):451-463
Rice J R.Elastic fracture mechanics concepts for interfacial cracks [J].ASME Journal of Applied Mechanics.1988,55(1):98-103