| Autor: |
Ulrich Fotheringham, Balajee Ananthasayanam, Laeticia Petit, Christopher L. Cox, Benjamin Tincher, Paul F. Joseph, Scott Gaylord, Kathleen Richardson |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Journal of the American Ceramic Society. 93:2207-2214 |
| ISSN: |
0002-7820 |
| DOI: |
10.1111/j.1551-2916.2010.03722.x |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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