Modeling and simulation of residual stresses during glass bulb pressing process  

作　　者：ZHOU HuaMin, XI GuoDong & LI DeQun State Key Laboratory of Plastic Forming Simulation and Mold & Die Technology, Huazhong University of Science and Technology, Wuhan 430074 

出　　处：《Science China(Technological Sciences)》2007年第1期103-117,共15页中国科学（技术科学英文版）

基　　金：the National Natural Science Foundation of China (Grant No. 50205011),;the Program for New Century Excellent Talents in University (Grant No. NCET-04-0718)

摘　　要：The residual stresses accumulated in the forming process have great effects on the product quality of the glass bulb. Based on the characteristics analysis of glass bulb forming, a mathematical model has been established for calculating residual stresses of glass pressing process. The material is assumed as thermorheologically simple thermoviscoelastic material, and the flow-induced stress is neglected. The consequences of equilibrium and compatibility equations are discussed in detail, and the boundary conditions are specified for various stages of the forming process. The numerical solution is based on the theory of thin layers, combined with finite difference method in the time and layer difference in the thickness direction. The presented model and solution method could easily be extended to general pressing process of glass, and applied to problems relative to glass pressing, providing extensive reference values. Keywords glass bulb - residual stresses - mathematical modeling - numerical simulation - theory of thin layers Supported by the National Natural Science Foundation of China (Grant No. 50205011), and the Program for New Century Excellent Talents in University (Grant No. NCET-04-0718)

关 键 词：GLASS BULB RESIDUAL stresses mathematical modeling numerical simulation theory of thin LAYERS 

分 类 号：TQ171[化学工程—玻璃工业]