| Cyclic Fatigue Behaviour of Porcelain
under Repeated Impact |
SoUMEN MAITY, lAY ANT A CHAUDHURI AND B. K. SARKAR
Pages : 1-7
DOI :10.1080/0371750X.1994.10804620 |
| Abstract |
| Ceramics are often put to applications where they are subjected to
cyclic stresses frequently involving sudden loading. Thus, in the
design of such materials there is growing concern about their
response to repeated impact behaviour. In the present work, an
improved pendulum type impact apparatus has been described
for determining single and repeated impact strength. A definite
fatigue behaviour has been demonstrated for specimens of a hard
porcelain with progressive endurance at lower stress regimes.
Endurance limit beyond 2 x 104 cycles was about 24.12% of the
single impact breaking strength. Fatigue resistance parameter of
the material was 5.52. Microstructural evidence showed that the
fatigue crack path was mainly transgranular, controlled by
porosity. Effect of cumulative residual stress is suggested to
explain the fatigue behaviour of the porcelain. |
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