Evaluating the viscoelastic properties of glass above transition temperature for numerical modeling of lens molding process

Zhou Tianfeng, Jiwang Yan, Tsunemoto Kuriyagawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Glass molding process has emerged as a promising way to produce complex optical elements with high precision. Glass material shows explicit viscoelasticity at molding temperature, therefore studying the viscoelastic properties of glass at elevated temperature is important for the molding process. In this paper, Young's modulus and viscosity of glass were tested by compressing cylindrical glass gobs above the transition temperature, and obtained by curve fitting using the Burgers model of viscoelastic deformation. Based on the viscoelastic parameters obtained from experiments, a numerical model was developed to simulate the glass molding process with the help of a commercial finite element method software package. The simulation results provide an easy way to analyze and understand the molding process in detail, such as temperature distribution, stress, strain and strain rate, which are difficult or impossible to measure in experiments. A good agreement between the calculated pressing loads and the experimental results verified the validity of the numerical model, which can be applied to predict the pressing load during complex-shape glass lens molding process.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6624
DOIs
Publication statusPublished - 2008
Externally publishedYes
EventInternational Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings - Beijing, China
Duration: 2007 Sep 92007 Sep 12

Other

OtherInternational Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings
CountryChina
CityBeijing
Period07/9/907/9/12

Fingerprint

Molding
glass transition temperature
Lenses
lenses
Glass
glass
pressing
Numerical models
viscoelasticity
Viscoelasticity
curve fitting
Curve fitting
Optical devices
Glass transition temperature
compressing
Software packages
Superconducting transition temperature
strain rate
Strain rate
modulus of elasticity

Keywords

  • Finite element method
  • Glass lens
  • Molding process
  • Transition temperature
  • Viscoelasticity

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

Cite this

Tianfeng, Z., Yan, J., & Kuriyagawa, T. (2008). Evaluating the viscoelastic properties of glass above transition temperature for numerical modeling of lens molding process. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 6624). [662403] https://doi.org/10.1117/12.791054

Evaluating the viscoelastic properties of glass above transition temperature for numerical modeling of lens molding process. / Tianfeng, Zhou; Yan, Jiwang; Kuriyagawa, Tsunemoto.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6624 2008. 662403.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tianfeng, Z, Yan, J & Kuriyagawa, T 2008, Evaluating the viscoelastic properties of glass above transition temperature for numerical modeling of lens molding process. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 6624, 662403, International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Optoelectronic System Design, Manufacturing, and Testings, Beijing, China, 07/9/9. https://doi.org/10.1117/12.791054
Tianfeng Z, Yan J, Kuriyagawa T. Evaluating the viscoelastic properties of glass above transition temperature for numerical modeling of lens molding process. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6624. 2008. 662403 https://doi.org/10.1117/12.791054
Tianfeng, Zhou ; Yan, Jiwang ; Kuriyagawa, Tsunemoto. / Evaluating the viscoelastic properties of glass above transition temperature for numerical modeling of lens molding process. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6624 2008.
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