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Thermal-Mechanical Analysis of the Biaxial Stretch of Aviation Glass
- Acta Armamentarii Vol. 44, Issue 10, Pages: 3187-3194(2023)
- 作者机构：
1. 沈阳工业大学 机械工程学院, 辽宁 沈阳 110870
2. 锦西化工研究院有限公司, 辽宁 葫芦岛 125000
- 作者简介：
- 基金信息：
DOI：10.12382/bgxb.2022.0459
CLC：Received：30 May 2022，
Online First：15 December 2023，
Published：30 October 2023
- 稿件说明：
移动端阅览
Wenhui ZHAO, Shihuan BAI, Dayong GAO, et al. Thermal-Mechanical Analysis of the Biaxial Stretch of Aviation Glass[J]. Acta Armamentarii, 2023, 44(10): 3187-3194.
Wenhui ZHAO, Shihuan BAI, Dayong GAO, et al. Thermal-Mechanical Analysis of the Biaxial Stretch of Aviation Glass[J]. Acta Armamentarii, 2023, 44(10): 3187-3194. DOI： 10.12382/bgxb.2022.0459.
摘要
为提高航空玻璃双向拉伸质量和拉伸成功率
满足军用战机要求
对航空玻璃双向拉伸进行研究。基于黏弹性材料的热力耦合理论
利用时温等效性方程
以Prony级数形式模拟有机玻璃的黏弹特性。建立双向拉伸有限元模型
对有机玻璃双向拉伸中的加热、冷却过程进行温度场分析;将计算的温度场结果导入双向拉伸分析
根据仿真选取拉伸速度
得到9个夹具处的位移拉伸力曲线
并拟合出位移-拉伸力关系表达式;对拉伸后的有机玻璃进行冷却定型模拟
航空玻璃冷却产生的力达到拉伸力的约2倍
采用拉杆回缩的方式减小收缩力10000N
防止玻璃破裂或设备损坏。研究结果表明
35mm厚航空玻璃的双向拉伸试验结果与仿真结果一致
根据仿真结果优化拉伸工艺
提高了拉伸质量与成功率。
Abstract
This study focuses on enhancing the quality and success rate of biaxial stretching for aviation glass to meet the stringent requirements of military fighter applications. Based on the thermal mechanical coupling theory of viscoelastic materials
the viscoelastic properties of plexiglass are simulated in the form of Prony series by using the principle of WLF time temperature equivalence. The finite element model of biaxial stretching is established
and the temperature field of heating and cooling process in biaxial stretching of plexiglass is analyzed. The calculated temperature field results are introduced into the biaxial stretch dynamic analysis. The displacement and stretch force curves are obtained for 9 fixtures
and the displacement stretch force relationship expression is fitted. The cooling shaping simulation of the stretched plexiglass is carried out. The force generated by the cooling of aviation glass is about twice the stretch force. The retraction of the pull rod is adopted to reduce the shrinkage force of 10000N to prevent glass breakage or equipment damage. The biaxial stretch test results of 35mm thick aviation glass are consistent with the simulation results. The stretch process is optimized according to the simulation results
and the tensile quality and success rate are improved.
关键词
Keywords
references
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YE H C , YU Y Y , ZHANG T . Simulation and optimization of roll to roll hot embossing based on viscoelastic material PMMA [J ] . IOP Conference Series: Materials Science and Engineering , 2020 , 768 ( 4 ): 042024 . DOI: 10.1088/1757-899X/768/4/042024 http://doi.org/10.1088/1757-899X/768/4/042024 The roll to roll hot embossing(R2RHM) is an innovative technique for rapid fabrication of polymer microcomponents. In this paper, ABAQUS simulation software is used to establish the roller model in R2RHM. Moreover, the polymer material model PMMA viscoelastic material model is given by Prony series and WLF equation. Based on these models, the influence of five factors, as pattern radius, velocity, interference, temperature and duty cycle, on the quality of R2RHM is studied by a control variable method, and the influence trend of eachsingle factor on the quality of hot impression is obtained. It is resulted that the radius of the pattern has little effect on the quality of the hot impression, while the velocity, interference, temperature and duty cycle exhibited a significant effect on the quality of the hot impression.
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