摘要
在高分子材料加工的数值模拟过程中 ,常采用粘度模型来描述高聚物的粘性行为 .Cross -Ar rhenius模型能够在各种温度、压力条件下 ,在剪切速率从 10 0 s-1到 10 4 s-1的变化范围内 ,相当精确地描述高聚物的粘性 .采用Gauss -Newton法 ,根据实验值 ,准确地拟合出粘度模型的参数值 ,此方法对初值选择的要求低、拟合结果的相关性好 。
Viscosity mold is always used to describe viscous behaviors of polymer in the process of numerical simulation of polymer processing. Cross-Arrhenius mold can describe viscosity of polymer accurately with shear velocity ranging between 10 0 s -1 to 10 4 s -1 under various conditions of temperature and pressure. In order to fit parameters' values of viscosity mold with accuracy based ontest, this paper introduces Gauss-Newton method. The advantages of this method are as follows: no rule of choosing initial parameter, ideal relevance of fitting results and adaptability for different molds.
出处
《郑州工业大学学报》
2000年第4期55-57,69,共4页
Journal of Zhengzhou University of Technology
基金
国家自然科学基金资助项目! (196 32 0 0 4)
河南省自然科学基金资助项目! (9840 6 0 70 0 )
关键词
G-N法
高聚物
粘度模型
参数拟合
viscosity mold
parameter fitting
Gauss-Newton method
