内胎胶挤出流动中第一法向应力差的预测

梁基照

　　摘要：用毛细管流变仪考察了内胎胶挤出口型膨胀行为。基于实测的挤出胀大比数据，借助相关的公式估算了试样的第一法向应力差（N1），并与几个熟知公式的预测结果进行了比较。结果表明，预测的N1与用Bagley等和Graessley等提出的公式的计算值较为接近。
　　关键词：内胎胶；挤出；口型膨胀；第一法向应力差；剪切应力
　　中图分类号：TQ015　　文献标识码：A
　　文章编号：1000－1255（2000）05－0303－03

Prediction of first normal stress difference during extrusion flow of tube compound

Liang Jizhao
(Department of Industrial Equipment and Control Engineering,South China University of Technology,Guangzhou,Guangdong 510641)

　　Abstract：The die－swell behaviour of tube compound under the experimental conditions was investigated by capillary rheometer.On the basis of the measured die－ swell ratio data,the first normal stress difference (N1) was estimated by using the corresponding equations and the calculations were compared with the predictions of several well－known equations.The results showed that the predictions of N1 with the author′s equations were close to the values calculated using the equations proposed by Bagley and Graessley respectively.
　　Keywords：tube compound;extrusion;die－swell;first normal stress difference; shear stress

作者简介：梁基照，博士，副教授。已发表论文300余篇。
梁基照（华南理工大学工业装备与控制工程系，广东广州510641）

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收稿日期：1999－08－17