Browsing by Author "Maschke, Andreas"

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Glass transition and instant freezing theories - A comparison of frozen-in temper stresses
    (Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft, 1998) Seifert, Wolfgang; Maschke, Andreas; Dubiel, Manfred
    For many practical cases of tempering the temper stresses calculated by instant freezing theories are sufficient and in good agreement with experiments. The auhors give a brief summary of the theories by Adams and Williamson, Bartenev and Indenbom and discuss their numerical Implementation. For example, frozen-in temper stresses are calculated and discussed within the model of a symmetrically cooled, infinite glass plate. Based on the numerical soludon of the heat conduction equadon with a given heat transfer coefficient, especially the influence of the inidal temperature of quenching is investigated. Furthermore, a numerical algorithm is presented to calculate the temporal evoludon of the permanent temper stresses for Indenbom's theory. Finally, as a practical example, residual stresses are determined in the surface of a tempered glass-particle composite system.