Failure prediction for heat treated window glass

Date

1995-12

Journal Title

Journal ISSN

Volume Title

Publisher

Texas Tech University

Abstract

A failure prediction model for heat treated window glass has been advanced. The failure prediction model for heat treated window glass is an extension of the failure prediction methodology developed for annealed window glass. The failure prediction model for heat treated window glass relates the probability of window glass failure to the characteristics of the surface flaws on the glass and the magnitude of the induced residual compressive surface stress in the glass. The characteristics of the surface flaws can only be estimated from the results of carefully controlled window glass failure tests. Four samples of heat treated monolithic window glass are tested to failure under uniform lateral loading which increases linearly with time from the inception of loading to failure. Surface strength parameters are estimated for three samples of new heat treated window glass using the failure prediction model in conjunction with their 60-second equivalent failure strength data and the residual compressive surface stress in the glass. The magnitudes of the residual compressive surface stresses in the new heat treated window glass samples are estimated using stress measuring devices. The surface strength parameters and the magnitude of the induced residual compressive surface stress for a sample of weathered heat strengthened window glass are estimated using a statistical procedure in conjunction with the failure prediction model.

Description

Keywords

Glass, Windows

Citation