PSI - Issue 2_B

Maria Kashtalyan et al. / Procedia Structural Integrity 2 (2016) 3377–3384 Author name / Structural Integrity Procedia 00 (2016) 000–000

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tensile stresses in the ceramic layer in the vicinity of ceramic/metal interface, indicating the possibility of debonding as a competing failure mechanism.

22 22 ~ /   c in the ceramic layer as a function of co-ordinate ( )

Fig. 4. Normalized axial stress

2 x for a range of crack spacing to layer thickness

0.  w D ; (b) with relative crack widening

10%  w D .

ratios as predicted by the analytical model: (a) no widening

Fig. 5. Axial stress distribution in the cracked ceramic layer for three crack half-spacing to layer thickness ratios: (a) /

1.3  c s h ; (b) /

1.0  c s h ;

(c) /

0.7  c s h . No crack widening.

Fig. 6. Axial stress distribution in the cracked ceramic layer for /

1.3  c s h : (a) without crack widening

0.  w D ; (b) with relative crack widening

10%  w D ; c) with relative crack widening

15%  w D .