Abstract:
A new criterion
of fracture mechanics-stochastic characteristics for ceramic
tool fracture based on the analysis of its fracture features in
intermittent turning, is proposed in the paper. A series of
experiments on mechanical performance for ceramic tool as well
as cutting tests on tool life by fracture have been done. The
stresses in tool tip are analysed by finite element method. All
of these show that the modified distribution function of
theoretical tool life by fracture derived from the mentioned new
criterion presents a good agreement with the experimental
results. SEM analysis on the tool fracture faces indicates the
late fracture of ceramic tool appears in fatigue features.
Key words:
Ceramic tool Criterion of fracture
Fracture mechanics Fracture mechanism Tool life by fracture
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