| Subcritical crack growth phenomenon in zirconia is modelled in this
paper. The model simulates subcritical crack growth by deflection
mechanism. Due to phase transformation in zirconia, KJ, the applied
stress intensity factors in the subcritical crack growth range get
affected. This is the main reason for the following observations: (i)
scattering in Kr V data, (ii) biassing of N values to higher magnitude
and (iii) calculating erroneous life times. All the above mentioned
experimental observations are explained by the present model. |
