Experimental validation of edge strength model for glass with polished and cut edge finishing

In literature, the experimental validation of a glass edge strength model is lacking. Therefore, in this study, an edge strength model was established and validated. The short-term parameters of the edge strength model, i.e. the flaw geometry and depth, were determined by means of testing at a high stress rate. This was done for polished and cut edges. Next, the strength model, including subcritical crack growth, was established. Finally, the edge strength model was validated by the test results at a low stress rate. The assessed model was found to be slightly conservative, compared to the test results.

► An edge strength model is crucial to design glass beams or mullions.
► Flaw shape and depth highly influence the short-term edge strength.
► Assessment of the flaw geometry factor by means of bending tests at high stress rate.
► Subcritical crack growth affects the long-term edge strength.
► Validation of the edge strength model by means of bending tests at low stress rate.