Details

Autor(en) / Beteiligte

• Smail, Jacob W.
• Green, David J.
• Abrams, Matthew B.

Titel

Onset of Cone Cracking in Ion-Exchanged Glass

Ist Teil von

• Journal of the American Ceramic Society, 2007-01, Vol.90 (1), p.333-335

Ort / Verlag

Malden, USA: Blackwell Publishing Inc

Erscheinungsjahr

2007

Quelle

Wiley Online Library

Beschreibungen/Notizen

• A simple fracture mechanics approach is used to predict the critical crack size required to initiate Hertzian cracks in a brittle material in the absence and presence of a residual surface stress. To test the approach, the load and location of ring/cone cracks are measured in a silicate glass before and after ion exchange. The crack sizes estimated by this technique are, however, different before and after the ion‐exchange process. It is concluded that the ion‐exchange process changes the nature of the surface flaws, which is a key assumption in previous theoretical analyses in using Hertzian contacts as a means to estimate surface stress.