#AskGlaston Episode 49: Do we get the same internal strength after glass cutting as without it?

This week, we are dealing with this one interesting question:

  1. Do we get the same internal glass strength after glass cutting as without it?

We have done some experiments on the heat-strengthened glass. After heat treatment, we have cut the glass with a water jet without any breakage. Then, we have done some break tests on them, and all of the break patterns have been normal as compared to heat-treated glass without cutting.
After cutting, will we get the same internal glass strength as without cutting?

Thank you for your question. It is interesting to hear that you have been able to cut a heat-strengthened glass with a water jet. The common thought is that it is not possible to cut heat-strengthened glass because during the cutting, the cut edge is getting into a tensile zone, and that breaks the glass.

But what you have asked is whether the strength can remain as good as before. It is possible that it is! This is because the cutting process changes only the stresses around the edges. And it only affects as much of the glass length from the edge, as the edge thickness of this glass. This is where that glass stress profile changes.

But of course, it might also be so that there still is a small change in the overall strength of glass because the glass edge work becomes different compared to what it was before.

Wollen Sie mehr erfahren?

Für den Glastory-Newsletter anmelden

Diesen Beitrag teilen

Über den Autor

Antti Aronen

An experienced researcher and engineer in the field of theoretical and experimental research, Antti is Glaston’s Senior Research Engineer in D&I. He is passionate about sharing his deep knowledge of glass products and processes with others. His PhD thesis was on glass heat treatment, and he continues to enthusiastically model the tempering process today. An innovator at heart, he has even registered some patents over the years. To counterbalance living at the top of the world in Finland, he spent nearly 4 years “down under” as a Research Fellow at the University of Sydney in Australia.

- Website