摘要
利用非线性有限元软件MSC.Marc建立非球面光学玻璃透镜模压的有限元模型,选择广义Maxwell模型作为粘弹性模型输入,设定边界条件,进行了玻璃加热和模压阶段的仿真,查看并分析其温度及应力变化。观察了接触点上的应力情况,得知等效应力随曲率的增减而增减。模拟了4组温度下透镜模压的应力应变情况,对结果进行分析,得知等效应力随着温度的升高而减小,应变随着温度的升高而增大,580℃下的应力应变效果最好。模拟了3组模压速率下的应力情况,得知等效应力随着速率的增大而增大。但是过高的温度或过低的速率都将引起不必要的浪费,0.1mm/s时模压效果最佳。
A finite element model of optical glass aspherical lens is constructed with the nonlinear finite element software MSC. Marc. The general Maxwell model is chosen as the viscoelasticity model and the boundary conditions are set, the heating and pressing processes are simulated, and their temperature and stress are observed and analyzed. The equivalent stress at the touching point is observed, and the result is that it increases when the curvature increases, and decreases when the curvature decreases. Pressing processes at 4 different temperatures are simulated, and their stress and strain effects are compared. The result shows that the equivalent stress decreases when the temperature increases, and the equivalent total strain increases when the temperature increases. 580 ℃ is the optimized temperature. Stresses at 3 different molding velocities are simulated, and the result shows that the equivalent stress increases when the velocity increases. But high temperature or low velocity causes unnecessary waste. 0.1 mm/s is the optimized velocity.
出处
《激光与光电子学进展》
CSCD
北大核心
2013年第3期148-155,共8页
Laser & Optoelectronics Progress
基金
国家自然科学基金(51005212)
浙江公益性技术应用研究计划(2011C21003)
中国科学院空间激光通信及检验技术重点实验室开放基金资助课题
关键词
光学制造
玻璃模压
等效应力
应变
有限元方法
粘弹性
glass mold pressing
equivalent stress
strain
finite element method （FEM）
viscoelasticity
