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

Zhou Tianfeng, Yan Jiwang, Tsunemoto Kuriyagawa

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

5 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 publicationInternational Symposium on Photoelectronic Detection and Imaging 2007
Subtitle of host publicationOptoelectronic System Design, Manufacturing, and Testing
DOIs
Publication statusPublished - 2008 Mar 31
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

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6624
ISSN (Print)0277-786X

Other

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

Keywords

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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Tianfeng, Z., Jiwang, Y., & Kuriyagawa, T. (2008). Evaluating the viscoelastic properties of glass above transition temperature for numerical modeling of lens molding process. In International Symposium on Photoelectronic Detection and Imaging 2007: Optoelectronic System Design, Manufacturing, and Testing [662403] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6624). https://doi.org/10.1117/12.791054