变比热的塑件瞬态温度场数值模拟  

Numerical simulation of transient temperature field of plastic part of variable specific heat

作　　者：王博[1] 陈利民[1] 程大君[1] 陆明刚[1] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065

出　　处：《模具工业》2006年第7期1-4,共4页Die & Mould Industry

基　　金：国家自然科学基金资助项目(20304008);四川大学青年科学基金资助项目(4320405)

摘　　要：对塑件冷却过程进行分析,通过假设,建立了一维非稳态传热模型。考虑无定形聚合物和结晶型聚合物的比热对温度的依赖性,利用分段线性函数拟合聚合物的比热—温度曲线,通过对空间域和时间域的离散化,运用有限差分数值方法,模拟了无定形聚合物和结晶型聚合物注塑平板在模具中冷却的一维瞬态温度场。One-dimensional unsteady-state heat transfer model was established based on the analysis on cooling process of injection molding plastic flat sheet. The temperature dependent specific heat curves of both amorphous and crystalline polymers were fitted by piecewise linear function. Through the discretization of spatial domain and temporal domain and the application of finite difference numerical method, one-dimensional transient temperature field used for simulating cooling process of amorphous and crystalline polymers flat sheet in injection mould was built.

关 键 词：塑件 瞬态温度场 数值模拟 有限差分 变比热 

分 类 号：TP311.132[自动化与计算机技术—计算机软件与理论]