scholarly journals Theoretical prediction of energy release rate for interface crack initiation by thermal stress in environmental barrier coatings for ceramics

2017 ◽  
Vol 843 ◽  
pp. 012004
Author(s):  
E Kawai ◽  
Y Umeno
Keyword(s):  
Thermal Stress ◽  
Crack Initiation ◽  
Theoretical Prediction ◽  
Energy Release Rate ◽  
Energy Release ◽  
Interface Crack ◽  
Release Rate ◽  
Barrier Coatings ◽  
Environmental Barrier Coatings ◽  
Environmental Barrier

Analysis of Branched Interface Cracks

1990 ◽  
Vol 57 (4) ◽  
pp. 887-893 ◽  
Author(s):  
D. J. Mukai ◽  
R. Ballarini ◽  
G. R. Miller
Keyword(s):  
Energy Release Rate ◽  
Energy Release ◽  
Interface Crack ◽  
Finite Length ◽  
Release Rate ◽  
Rate Ratio ◽  
Maximum Energy ◽  
Crack Branching ◽  
Maximum Energy Release ◽  
Branch Crack

A solution is presented for the problem of a finite length crack branching off the interface between two bonded dissimilar isotropic materials. Results are presented in terms of the ratio of the energy release rate of a branched interface crack to the energy release rate of a straight interface crack with the same total length. It is found that this ratio reaches a maximum when the interface crack branches into the softer material. Longer branches tend to have smaller maximum energy release rate ratio angles indicating that all else being equal, a branch crack will tend to turn back parallel to the interface as it grows.

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