基于光学畸变要求的注射成型透明平板应力翘曲分析  

Residual Stresses,Warpage and Shrinkage Analysis of Injection Molded Transparent Panel Based on Optical Distortion

作　　者：陈宇宏[1] 袁渊[1] 张宜生[2] 李曦[3] 詹茂盛[3] 

机构地区：[1]北京航空材料研究院,北京100095 [2]华中科技大学,武汉430074 [3]北京航空航天大学,北京100191

出　　处：《航空材料学报》2008年第6期82-87,共6页Journal of Aeronautical Materials

基　　金：国家高技术研究发展计划(863)项目(2007AA03Z534);总装预研项目(51312020114)

摘　　要：研究了注射成型翘曲应力计算模拟对成型透明件光学畸变预测的意义。首先建立了残余应力计算模型和翘曲计算模型,采用了HsCAE软件的相应模块,对透明平板注射过程中的残余应力、翘曲变形及收缩进行了分析。结果表明,平板边缘的残余应力和厚向收缩大而且不均;而中间区域的残余应力和厚向收缩率小且比较均匀;平板中间区域的翘曲变形量最大,且沿平板平面向四周均匀递减。实测了注射成型平板的外形尺寸,验证了模拟结果。光学畸变测试表明,计算模拟显示残余应力和厚向收缩分布不均的区域光学畸变相对严重,而残余应力和厚向收缩均匀的区域具有低光学畸变;翘曲变形均匀也有利于获得低光学畸变,从而显示了翘曲应力的计算模拟对光学畸变预测的指导意义。This paper investigates application of residual stresses and warpage simulation on the prediction of injection-molded transparency＇ s optical distortion. Numerical models of residual stresses and warpage were established , and HsCAE software modules were adopted to analyze residual stresses, warpage and shrinkage of injection molded transparent panel. The results show that residual stresses and thickness shrinkage in central zone of the transparent panel were much smaller and evener than in the panel edge, and warpage reached its maximum in pane centre and decreased uniformly from the centre to the surroundings. Panels were injection molded, and the test results verified the numerical simulations. Optical distortion tests indicate that the central zone where residual stresses and warpage were evenly distributed has a low optical distortion, but the panel edge where residual stresses and warpage were irregularly distributed shows a serious optical distortion. The results demonstrate the significance of numerical simulation on predication of injection-molded transparency＇ s optical distortion.

关 键 词：注射成型 透明件 光学畸变 残余应力 收缩率 翘曲 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]