光机系统胶接结构固化时间对面形精度的分析

摘要

在光机系统胶接结构中,为研究胶接剂固化收缩对镜片的影响,对胶接剂采用粘弹性模型进行了仿真计算,通过本构方程得到理论解,并采用当量温差法利用有限元分析软件ANSYS模拟收缩,分析了固化时间对镜片面形误差的影响.通过和线弹性模型对比,分析了粘弹性模型的优势.通过改变固化时间,分析了不同固化时间对镜片的不同影响.结果表明,仿真结果和理论解高度一致,且采用粘弹性模型可以很好地反映最终收缩应力随固化时间变化的关系,更好地模拟了收缩应力的生成过程；同时发现,对同一种胶接剂,通过改变环境适当延长固化时间,减小了对镜片面形误差的影响,因此可以适当延长固化时间以减小收缩应力.%In the bonding structure of the optical-mechanical system, for researching the influence on lens of the adhesive's curing shrinkage, the viscoelastic model is used for adhesive's simulation, and the theory solution can be gotten from the constitutive equation. The method of equivalent temperature and the Finite Element Analysis (FEA) soft ANSYS is used for simulating the shrinkage to analyze the influence on the surface figure error. Compared with the elastic model, the viscoelastic model has its advantages. Change the curing time for analyzing the influence on the lens. The analysis result shows that the simulation result fit the theory solution well, and the viscoelastic model can better describe the relationship between the time and the final shrinkage stress. Moreover, it can better simulate the generation of shrinkage stress. In regard to the same adhesive, through prolonging the curing time properly, there is the smaller influence on the surface figure error of the lens, so it can prolong the time for reducing the shrinkage stress.