A mechanism for sub-surface median crack initiation in glass during indenting and scribing

@article{Cheng1990AMF,
  title={A mechanism for sub-surface median crack initiation in glass during indenting and scribing},
  author={Weili Cheng and Iain Finnie},
  journal={Journal of Materials Science},
  year={1990},
  volume={25},
  pages={575-579}
}
The initiation of sub-surface median cracks in glass during indenting and scribing is studied. It is shown that the zone of intense deformation under the tool introduces a weak singularity which may have a strong influence on crack initiation. When combined with a crack nucleus, which need only be of the order of the dimensions of the glass network, the weak singularity allows the threshold load for median cracking to be estimated. This estimate is shown to be in good agreement with… CONTINUE READING

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