摘要
基于先进气辅口模完全滑移挤出成型过程的特点 ,建立了描述其成型过程的三维等温黏弹性理论模型 ,并通过DEVSS/SUPG等稳态有限元技术 ,建立了与该模型相适应的高效稳态有限元数值算法。通过数值模拟 ,研究了气辅口模完全滑移挤出成型机理 ,并给出了不同材料流变性能与其离模膨胀形貌的规律性关系 ,还揭示了其影响机理。数值模拟结果与R .H .Liang的实验结论相吻合。
Based on the characteristics of the full slip extrusion process in gas-assisted dies, a three-dimensional and isothermal viscoelasticity model was formulated to describe the gas-assisted extrusion process. A corresponding stable finite element method with fast convergence was established using finite element technology of DEVSS/SUPG,etc. Through numerical simulation, the mechanism of full slip gas-assisted extrusion was studied, and the relationship between rheological properties of various materials and pattern of die swell was found, which revealed the influencing mechanism. The results of simulation agreed with the experimental results of R.H.Liang.
出处
《中国塑料》
CAS
CSCD
北大核心
2005年第1期48-52,共5页
China Plastics
基金
国家自然科学基金资助项目 (2 0 2 740 16)
关键词
气辅口模完全滑移
离模膨胀
黏弹性
有限元
full slip of gas-assisted die
die swell
viscoelasticity
finite element
