摘要
充填和保压模拟的计算机软件在预测复杂薄壁型腔的流动行为方面已经比较准确。现行的数值方法主要采用基于中性层的有限元 /有限差分方法 ,中性层模型的引入使得模拟软件在应用中具有很大的局限性。采用表面模型取代中性层模型 ,通过附加在壁厚方向上的边界条件来保证同一截面上对应表面的协调流动。通过实验验证了这种表面模型能够处理由流行
Computer simulation packages have been success in predicting filling and post-filling behavior in extremely complicated geometries. However, most of the current numerical implementation is based on a hybrid finite-element/finite-difference solution with the middle-plane model. This kind of model leads to some inconveniences in applications. Instead of using the middle-plane as the datum plane, the surfaces of the cavity are used as datum planes in this paper. And additional boundary conditions in the gap-wise direction are employed to keep the flows in the surfaces at the same section coordinative. Comparisons with experimental results obtained with instrumented test mold and C-Mold results show good agreement in terms of pressure traces and melt-front advancement. It's demonstrated that the present formulation is well suited to handle cavities generated directly by current CAD systems.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2002年第16期1382-1384,共3页
China Mechanical Engineering
基金
国家自然科学基金资助项目 (5 9975 0 3 2 )
关键词
充填模拟
保压模拟
表面模型
注塑
CAE
plastic injection molding filling simulation post-filling simulation surface model
