拉伸流动

本文报道了对纤维素短纤维填充丁苯橡胶的剪切流动（用孟山都加工性能试验仪MPT、多速加压门尼粘度计MPMV和夹心式流变仪）和拉伸流动（用恒拉伸速度的孟山都拉力机）的研究结果。

The results of the studies on shear flow ( by using Monsanto Processability Tester , Multispeed Pressurized Mooney Viscometer and Sandwich Rheometer ) and elongational flow ( by using Monsanto Tensometer ) of short cellulose fiber filled SBR compounds are reported .

纤维复合材料在拉伸流动中的流变性质

Rheological properties of fibre composite in elongational flow

共转OldroydB流体剪切-拉伸流动研究

Research on Viscometric-Extensional Flow of Co-Rotational Oldroyd B Fluid

晶粒相对尺寸对FCC多晶体板材单向拉伸流动应力的影响

Effect of Relative Grain Size on the Flow Stress of Polycrystalline FCC Sheets in Simple Tension Test

轴对称拉伸流动中大表面张力下球形液滴Stokes流动的准确解

An Exact Solution of the Axisymmetric Stretching Stokes Flow Around the Spherical Liquid Drop Under Large Surface Tension

研究结果表明：GMT挤压流动过程中拉伸流动为主导流动，剪切应力的影响较小，可以应用拉伸流动模型来预测压力的大小。

The modelling results suggest that biaxial extension dominates the isothermal squeeze flow process , with apparently negligible shear flow effects .

拉伸流动中牛顿流体的Trouton比

Trouton ratio of Newton fluid for Elongational Flows

本文采用轴对称情形下内外Stokes流动的Sampson级数解求出了轴对称拉伸流动中大表面张力下球形液滴stokes流动的准确解。

Utilizing the Sampson series solution of the axisymmetric outer and inner Stokes flow the exact solution is obtained for the axisymmetric stretching Stokes flow around a spherical liquid drop under large surface tension .

扰动本构方程及粘弹流体拉伸流动不稳定性

Disturbed constitutive equation and instability of extensional flow of viscoelastic fluids

非织造布专用聚丙烯熔体拉伸流动性能研究

The Investigation on Elongational Flow Properties of Polypropylene Melts for Nonwovens

曲线拉伸流动数值模拟基础的研究

Basic Research on Numerical Stimulation of Flow by Stretch along a Curved Line

聚乙烯挤出拉伸流动行为的研究

Study on Elongation Flow Behaviour of Polyethylene During Extrusion

非牛顿流体纺丝拉伸流动

Extensional Flow of Non-Newtonian Fluid in Fiber Spinning

第三章分别从数学的角度和物理的角度阐述了流固物体曲线拉伸流动问题求解的近似理论。

In chapter 3 , some theories of approximation are given from the point of mathematics and from physics .

计算结果表明：适于单轴拉伸流动时的取向函数可以加以扩充用于纺丝过程；

The computed results show : the orientational distribution function of the uniaxial elongational flow can be extented to apply in fiber spinning ;

提出“准衰退记忆”新概念，发展了非牛顿流体扰动本构理论，并研究了粘弹流体拉伸流动的不稳定性规律。

The constitutive equation of second order for disturbed extensional flow is used to study the instability of stretching sheet of viscoelastic fluid .

并分别采用平均剪切速率、平均特征剪切应力以及平均拉伸流动指数等瞬态混合指数表征了组合螺杆的瞬态混合特性。

And instantaneous mixing capabilities were characterized in terms of average shear rate , average characteristic shear stress and average elongational flow index respectively .

第四章具体论述流固物体曲线拉伸流动问题求解的数值方法。

In chapter 4 , a numerical method for the model of ' flow of fluid-solid material along a curved line by stretch ' is derived from details .

结果表明，田菁水溶液的剪切流动和拉伸流动都可用改进的Williams-Bird四参数本构方程描述。

The results also showed that the modified Williams - Bird constitutive equation with four parameters is suitable for either shear flow or elongational flow of sesbania aqueous solution .

该混合器使物料在高剪切区产生拉伸流动，并使其多次通过高剪切区，可获得良好分散混合效果。

This mixer can make the material bring elongational flow at the high shearing zone , and passed through the zone for many times to gain the good dispersion mixing result .

在流道中心呈现拉伸流动，而壁面附近则为剪切流动。流道的中心部位存在比拉伸应力更大的第一法向应力差。

Near the channel wall renders a shear flow but at the central area of the channel exits an elongational flow and over there the first normal stress difference is larger than the elongational stress .

目前，围绕聚合物挤出流动过程所开展的实验研究大多在实验室中完成，其实验目的主要是从研究材料自身流变性出发，以简单剪切和拉伸流动为测试模型。

Currently , the related experiments on polymer melts flow are mainly conducted in the laboratory and the aim of which is to investigate rheological properties based on the simple model of shear or extensional flows .

随着CaCO3用量增加，共混物拉伸性能和流动性均下降。

When CaCO 3 amount increased , the tensile strength and flowability decreased .

结果表明，钎料的熔点、室温和高温拉伸强度、流动性等性能均能满足使用要求。

The results show that the melting point , room and high temperature tensile strength , fluidity of the brazing material can meet the requirement of engineering use .

研究结果表明：加入PP时，材料的拉伸强度、熔体流动速率和压缩永久变形增大，但其断裂伸长率迅速下降，回弹性逐渐降低；

The results showed that in case of adding PP , the tensile strength , melt flow rate and compression set of the SEBS increase , but the elongation at break decreases quickly and the elastic resilience decreases gradually ;

拉伸流变仪是研究聚合物熔体的拉伸流动性、拉伸强度以及拉伸粘度的重要设备，在科研及生产领域有广泛的应用。

RHEO-TENSION are important instruments which have been applied in the scientific research and manufacture widely , to study properties of elongational flow , breaking strength and elongational viscosity .