Abstract: The aim of this study was
to analyse the cutting mechanism of engineering ceramics using
the principles of fracture mechanics. With the aid of the finite
element method the stress field in the vicinity of the tool tip
and the location of primary crack occurrence were examined. The
trace of crack propagation and the effect of depth of cut on the
cutting process were examined by experiment for toughened ZrO2
and low purity Al2O3 ceramics. A model for the chip formation
process is proposed and the conclusions based on the model were
compared with results obtained by pictures taken with high speed
photographic equipment during grinding.
Key words:
Engineering ceramic Grinding Crack
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