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- Title
Thermal and Structural Property Characterization of Commercially Moldable Glasses.
- Authors
Gaylord, Scott; Ananthasayanam, Balajee; Tincher, Benjamin; Petit, Laeticia; Cox, Chris; Fotheringham, Ulrich; Joseph, Paul; Richardson, Kathleen
- Abstract
In this paper, we report the development of a kinetic model for precisely predicting glass material property response to a defined molding profile. The glass viscosity, thermal expansion, and specific heat properties for two commercial optical glasses, P-SK57 and L-BAL35 were measured and are reported in this paper. These data were used with the Tool–Narayanaswamy–Moynihan (TNM) model for glass structural relaxation in order to develop a thermal expansion model that simulates the glass workpiece changes through the critical cooling profile where the final workpiece shape is determined. The results show a structural relaxation model incorporated into an ABAQUS FEM code that precisely models the thermal expansion behavior acknowledging that the theory of structural relaxation is a critical element in predicting the final size and shape of a molded lens.
- Subjects
THERMAL properties; MOLDS (Casts &; casting); CHEMICAL kinetics; GLASS; STRUCTURAL analysis (Engineering); ASPHERICAL lenses; OPTICAL materials; LIQUID crystal displays; EQUILIBRIUM
- Publication
Journal of the American Ceramic Society, 2010, Vol 93, Issue 8, p2207
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2010.03722.x