Simulation Study on Secondary Pull-Down Process of Flexible Glass

doi:10.16552/j.cnki.issn1001-1625.2024.1331

Abstract

Abstract: The secondary pull-down process is an important process for preparing flexible radiation-resistant glass. However, it is difficult to accurately obtain the drawing characteristics of glass using secondary pull-down process and quickly adjust the process parameters. In this paper, the finite element simulation of ANSYS Polyfolw software was combined with actual drawing process parameters to simulate the changes of thickness field, velocity field and temperature field. The influences of secondary pull-down process parameters on the width and thickness of flexible glass after forming were analyzed and verified. The results show that in heating zone, the necking phenomenon causes the edge thickness of formed glass to be larger than center thickness, and the edge velocity component of glass along tensile direction is significantly smaller than center velocity component. In cooling zone, the glass edge temperature is significantly higher than center temperature. It is found that the heating temperature is positively correlated with the thickness of formed glass, and negatively correlated with width. The traction speed is negatively correlated with the thickness and width of formed glass. The initial thickness of glass is positively correlated with the thickness of formed glass, but negatively correlated with width.

Key words: flexible radiation resistant glass, secondary pull-down process, finite element simulation, necking phenomenon, field distribution, process parameter

CLC Number:

TQ171

ZHOU Jiahui, WANG Yanhang, XU Yinsheng, LI Xianzi, HAN Bin, HE Kun. Simulation Study on Secondary Pull-Down Process of Flexible Glass[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(5): 1859-1868.

References

[1] BACCARO S, CEMMI A, DI SARCINA I, et al. Gamma rays effects on the optical properties of cerium-doped glasses[J]. International Journal of Applied Glass Science, 2015, 6(3): 295-301.
[2] BACCARO S, CECILIA A, MIHOKOVA E, et al. Radiation damage induced by γ irradiation on Ce³⁺ doped phosphate and silicate scintillating glasses[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2002, 476(3): 785-789.
[3] 赵慧峰, 祖成奎, 王衍行, 等. 空间用抗辐照玻璃的二次电子发射系数及测量[J]. 硅酸盐通报, 2017, 36(增刊1): 98-102.
ZHAO H F, ZU C K, WANG Y H, et al. Secondary electron emission yield of antiradiation glass used in space and measurement[J]. Bulletin of the Chinese Ceramic Society, 2017, 36(supplement 1): 98-102 (in Chinese).
[4] 张微尘, 田英良, 王为, 等. 柔性玻璃生产制备方法综述[J]. 玻璃搪瓷与眼镜, 2021, 49(4): 33-38+43.
ZHANG W C, TIAN Y L, WANG W, et al. Review on production and preparation methods for flexible glass[J]. Glass Enamel & Ophthalmic Optics, 2021, 49(4): 33-38+43 (in Chinese).
[5] ELLISON A, CORNEJO A I. Glass substrates for liquid crystal displays[J]. International Journal of Applied Glass Science, 2010, 1(1): 87-103.
[6] 彭寿, 石丽芬, 马立云, 等. 柔性玻璃制备方法[J]. 硅酸盐通报, 2016, 35(6): 1744-1747.
PENG S, SHI L F, MA L Y, et al. Method of preparing flexible glass[J]. Bulletin of the Chinese Ceramic Society, 2016, 35(6): 1744-1747 (in Chinese).
[7] WANG Y H, HAN T, HE K, et al. Viscosity-temperature characteristics and application of high borosilicate glass[J]. Key Engineering Materials, 2020, 837: 125-132.
[8] 郭振强, 袁坚, 淮旭光, 等. 柔性玻璃制备及加工技术进展[J]. 硅酸盐通报, 2020, 39(2): 585-591.
GUO Z Q, YUAN J, HUAI X G, et al. Technical progress on preparation and processing of flexible glass [J]. Bulletin of the Chinese Ceramic Society, 2020, 39(2): 585-591 (in Chinese).
[9] MILUTINOVIĆ-NIKOLIĆ A, JANČIĆ R, ALEKSIĆ R. Modeling of drawing thin glass sheet from a preform[J]. Journal of the Serbian Chemical Society, 1998, 63(3): 219-230.
[10] SRINIVASAN S, WEI Z, MAHADEVAN L. Wrinkling instability of an inhomogeneously stretched viscous sheet[J]. Physical Review Fluids, 2017, 2(7): 074103.
[11] TARONI M, BREWARD C J W, CUMMINGS L J, et al. Asymptotic solutions of glass temperature profiles during steady optical fiber drawing[J]. Journal of Engineering Mathematics, 2013, 80: 1-20.
[12] KIELY D, BREWARD C J W, GRIFFITHS I M, et al. Edge behaviour in the glass sheet redraw process[J]. Journal of Fluid Mechanics, 2015, 785: 248-269.
[13] CHOUFFART Q, SIMON P, TERRAPON V E. Numerical and experimental study of the glass flow and heat transfer in the continuous glass fiber drawing process[J]. Journal of Materials Processing Technology, 2016, 231: 75-88.
[14] YIN Z, JALURIA Y. Neck down and thermally induced defects in high-speed optical fiber drawing[J]. Journal of Heat Transfer, 2000, 122(2): 351-362.
[15] MU Y, HANG L Q, ZHAO G Q, et al. Modeling and simulation for the investigation of polymer film casting process using finite element method[J]. Mathematics and Computers in Simulation, 2020, 169: 88-102.
[16] FULCHER G S. Analysis of recent measurements of the viscosity of glasses[J]. Journal of the American Ceramic Society, 1999, 75(5): 1043-1055.
[17] Trouton F T. On the coefficient of viscous traction and its relation to that of viscosity[J]. Proceedings of the Royal Society of London, 1906, 77(519): 426-440.
[18] CUI Z R, SHAO G S, ZHANG M X, et al. Size-dependent viscosity of silica optical fiber under high temperature[J]. Optical Materials Express, 2023, 13(8): 2302-2315.
[19] HU Z, MEDURI C S, BLAWZDZIEWICZ J, et al. Nanoshaping of glass forming metallic liquids by stretching: evading lithography[J]. Nanotechnology, 2018, 30(7): 075302.
[20] LIU B, YUAN J, GUO Z, et al. Numerical simulation of a viscoelastic thinning process for preparing flexible glasses by redrawing method[J]. Journal of Wuhan University Technology-Materials Science Edition, 2023, 38(1): 65-71.