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Physics of Non Crystalline Solids
Proceedings of the 5th International Conference / Physique des Solides Non Cristallins
Comptes rendus du 5ème Congrès International
J. Phys. Colloques 43 (1982) C9-615-C9-618
DOI: 10.1051/jphyscol:19829123
THERMAL STRESSES IN GLASS PANELS WITH MULTIPLE HOT ZONES
S.T. Gulati1, D.A. Nolan1 et Ch. Janssen21 Corning Glass Works, Corning, N.Y. 14830, U.S.A.
2 Corning Research Inc., BP 3, Avon 77211, France
Résumé
L'effet de deux zones chaudes de diamètres différents sur les contraintes thermiques existant dans les régions restées froides de plaques de verre rectangulaires est investigué par la méthode des éléments finis. Comparés à ceux obtenus par une expression analytique approchée, les résultats sont trouvés consistants à 15% près. La simplicité de la solution analytique en fait un outil intéressant lors de la conception de panneaux de verre destinés à être chauffés de façon non uniforme. L'expression est aussi utile pour évaluer la probabilité de fracture thermique en comparant les niveaux de contraintes des régions situées entre deux zones chaudes à ceux des bords de la plaque.
Abstract
The interaction of two unequal circular hot zones on thermal stresses in the remaining cold region of rectangular glass panels is examined via finite element analysis. The results are then compared with those given by an approximate analytical solution. The FEM and analytical solutions agree to within 15%. The simplicity of the analytical solution, however, makes it a useful screening tool during the design phase of nonuniformly heated glass panels. The solution is also useful for assessing the probability of thermal fracture by comparing stresses in the region between the hot zones with those at the edge of the panel.
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