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西南交通大学 力学与航空航天学院 应用力学与结构安全四川省重点实验室,四川 成都 610031
[ "伍海华(1996—),男,四川广安人,硕士研究生,2019年于山东科技大学获得学士学位,主要从事有限元数值仿真研究。E-mail:1006122096@qq.com" ]
[ "刘 娟(1986—),女,安徽芜湖人,博士,副教授, 2013年于西南交通大学获得博士学位,主要从事微动磨损及工程数值仿真方面的研究。E-mail:527312148@qq.com" ]
收稿日期:2022-06-08,
修回日期:2022-07-05,
纸质出版日期:2022-11-05
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伍海华, 刘娟. 柔性屏滑卷过程力学行为数值研究[J]. 液晶与显示, 2022,37(11):1446-1452.
WU Hai-hua, LIU Juan. Numerical research on mechanical properties of flexible screen in sliding process[J]. Chinese journal of liquid crystals and displays, 2022, 37(11): 1446-1452.
伍海华, 刘娟. 柔性屏滑卷过程力学行为数值研究[J]. 液晶与显示, 2022,37(11):1446-1452. DOI: 10.37188/CJLCD.2022-0191.
WU Hai-hua, LIU Juan. Numerical research on mechanical properties of flexible screen in sliding process[J]. Chinese journal of liquid crystals and displays, 2022, 37(11): 1446-1452. DOI: 10.37188/CJLCD.2022-0191.
柔性屏模组是不同屏幕膜层和光学透明胶OCA(Optical Clear Adhesive)堆叠的一种复合结构,其具备良好的显示效果和柔性。滑卷作为柔性屏的一种新型展开方式,其力学行为尚待研究。本文基于有限元方法建立了适用于柔性滑卷屏的双滑卷轴结构的数值模型,数值分析了不同滑卷轴半径、堆叠结构顺序和胶层厚度形状对滑卷过程中屏幕力学性能的影响。结果表明,柔性屏模组在滑卷过程中的应力随着滑卷半径的减小而增大,其最大应力出现在支撑层,最优的滑卷半径在3~3.5 mm之间。互换显示层和背板层的堆叠顺序使显示层位于整个膜组的中间位置并不能优化显示层的应力情况。胶层厚度形状会使各个膜层所处位置发生偏移,其中显示层应力主要受自身偏移量的影响,而受其他膜层偏移的影响较小。
The flexible screen module is a composite structure of different screen film layers and OCA (Optical Clear Adhesive) stacking which has good display effect and flexibility. As a new type of extending a flexible screen, its mechanical behavior remains to be studied. This paper establishes a numerical model based on the finite element method for the double scroll structure applicable to the flexible slidable screen, and numerically analyzes the effects of different scroll radii, stacking structure order and thickness shapes of the adhesive layer on the mechanical properties of the screen during sliding process. The results show that the stress of the flexible screen module during the sliding process increases with the decrease of the scroll radius, the maximum stress appears in the support film layer, and the optimal scroll radius is between 3 mm to 3.5 mm. Interchanging the stacking order of the OLED layer and the backplane layer so that the OLED layer is located in the middle of the entire module can not optimize the stress of the OLED layer. The thickness shape of the adhesive layer can offset the position of each film layer, where the stress of the OLED layer is mainly influenced by its own offset and less influenced by the offset of other film layers.
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