振动挤出过程中毛细管内聚合物熔体的剪切应力分析

ANALYSES OF SHEAR STRESS OF POLYMER MELT EXTRUDING THROUGH CAPILLARY UNDER THE VIBRATION FORCE FIELD

不依赖现有的任何本构关系 ,并考虑惯性项的影响 ,建立了平行叠加振动条件下毛细管内聚合物熔体剪切应力的计算公式 ;实验测量一定振动频率和振幅下毛细管瞬时入口压力、瞬时体积流量、以及体积流量与入口压力波形的相位差 ,通过上述公式即可求得振动力场下毛细管内聚合物熔体的剪切应力分布。

With a sine vibration acted in parallel direction of polymer melt's flowing,the characterization formula of polymer melt's shear stress in capillary is set up.Through measuring instantaneous data of capillary entry pressure,volume flux and their phase difference under vibration force field,polymer melt's shear stress in the wall of the capillary can be gotten.