Stress Distribution In Thermally Tempered Glass Panes Near The Edges, Corners And Holes - Part 1. Temperature Distrubitions During The Tempering Process Of Glass Panes

While theoretical and experimental analyses of temper stresses within the central areas of glass plates, i.e. for the theoretically "infinite plate", have been carried out in the past, the distribution of the induced stresses near the edges and holes have yet to be examined in order to give a complete description of the stress field in the entire plate. The build-up of temper stresses depends on the temperature distribution as a function of time. For this reason, in part one of this paper the two- and three-dimensional cooling phenomena during the tempering process have been studied for all zones of a pane by means of analytical solutions of the equation of heat conduction as well as by means of a discrete simulation (Finite Element Method).