中国激光, 2010, 37 (6): 1631, 网络出版: 2010-07-07
激光弯曲陶瓷片的数值模拟
Numerical Simulation of Laser Bending of Al2O3 Ceramic Slice
摘要
基于有限元软件ABAQUS建立了激光弯曲陶瓷基片的三维分析模型,对激光弯曲成形Al2O3陶瓷片进行了数值模拟;分析了激光弯曲陶瓷片的成形机理,研究了激光扫描过程中温度场、应力应变场和位移场的变化情况;对不同厚度试样的模拟结果进行对比,研究试样厚度对激光弯曲成形过程中的各场变量的变化,随着试样厚度的增加下表面温度可能达不到陶瓷材料的塑性转变点,残余拉应力水平明显增加。根据温度场和应力应变场的分析,得出最佳试样厚度范围为0.18~0.31 mm。
Abstract
A 3D thermal-mechanical finite element model for laser bending of Al2O3 ceramic slice is established with the ABAQUS code. Based on the fields of temperature, stress-strain and displacement from the simulation, the forming mechanism of laser bending of ceramic slice is investigated. The simulated results of different thicknesses are compared with each other, as well as the influence of specimen thickness on the fields of temperature, strain-stress and displacement. It is observed that as the thickness increased, the temperature on the bottom surface may not reach the plastic-turning temperature and the magnitude of the surface residual stress may increase. Through the analysis, it is found that the optimum thickness is between 0.18 mm and 0.31 mm under the specified processing parameters.
胡玲玲, 周建忠, 杨小东, 黄舒. 激光弯曲陶瓷片的数值模拟[J]. 中国激光, 2010, 37(6): 1631. Hu Lingling, Zhou Jianzhong, Yang Xiaodong, Huang Shu. Numerical Simulation of Laser Bending of Al2O3 Ceramic Slice[J]. Chinese Journal of Lasers, 2010, 37(6): 1631.