California glass expert witness performed a failure analysis on a pyrex glass baking dish. This dish was made from pyrex borosilicate glass, and the glass failure occured as the dish was being removed from the oven. The failure initiated at an internal glass defect. The defect appears to be a colapsed bubble (seed) in the […]
Glass Expert Witness Discusses Window Failure
Glass failure analysis expert discusses interesting window failure, that of a piece of antique window glass. The window expert performed a failure analysis that determined the failure initiated at crush damage from the scribing operation, and it started as a bending crack. It then transformed into a “thermal crack”. That is the crack front was […]
Glass Expert Discusses Termpered Glass Cookware
Modern Pyrex glass cookware is now made from tempered soda lime glass. As a result, there is a potential that the tempered glass failure will create dangerous projectiles. In one case it was found that if the temper glass stresses are not symmetrical, flying glass pieces will occur. In the present case, tempered glass cookware […]
Manufacturing Defect on Tempered Glass Window
Glass failure analysis expert witness performed a root cause failure analysis on window defects found on a recently built custom home. The upper left photograph shows the defect from the building exterior. The window defect resembles a dust or dirt streak and was not detected until the post construction window cleaning. In all cases, the […]
Tempered Glass Expert Describes Two Tempered Glass Fracture Surfaces
Glass failure analysis expert witness compares two typical tempered glass fractures. The lower photomicrograph shows a typical thermally tempered glass fracture surface . This piece is from a fully tempered glass sheet. That is; this glass has a surface compression stress of 10,000 psi or more. In addition, the compressive layer on each face is […]
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