期刊文献+

正弦应变下聚合物熔体的非仿射网络结构模型

NONAFFINE NETWORK STRUCTURAL MODEL OF MOLTEN HIGH POLYMER IN SINUSOIDAL STRAIN FIELD
下载PDF
导出
摘要 在正弦应变作用下,假设聚合物熔体的缠结网络形变是非仿射的,运用瞬态网络结构原理,并对上随体Maxwell本构方程加以改进,从而得到一个适合于振动剪切作用下的聚合物熔体的非仿射网络结构模型.并且在一种合理的初始简化条件下对模型进行数值分析,将理论预测值与实验值进行比较后得知二者具有较好的吻合性.同时,通过比较得知所建立的非仿射网络结构本构方程比仿射网络结构本构方程的精确度要高. The molten polymer's entanglement network is assumed to deform nonaffinely and the transient network structural theory with the revised upper convected Maxwell constitutive equation is used to establish a new nonaffine network structural model of molten high polymer in a sinusoidal strain field. With the simplified initial condition, we can easily carry out its numerical analysis. The predicted value agrees with the experimental value, and the precision of the nonaffine network structural model is higher than that of the affine network structural model.
作者 张娟 瞿金平
出处 《力学与实践》 CSCD 北大核心 2003年第2期15-18,共4页 Mechanics in Engineering
基金 国家自然科学基金项目(20074010 20027002) 广东省自然科学基金项目(20003031) 教育部博士学科点专项科研基金(1999056121)资助.
关键词 正弦应变 聚合物熔体 非仿射网络结构模型 非牛顿流体 振动剪切 nonaffine network structural model, nonaffine deformation, sinusoidal strain
  • 相关文献

参考文献4

  • 1[1]Giacomin AJ, Jeyaseelan RS. A constitutive theory for polyolefins in large amplitude oscillatory shear. Polymer Engineering and Science, 1995, 35:768~777
  • 2[2]Marrucci G, Titomanlio G, Sarti GC. Testing of a constitutive equation for entangled networks by elongational and shear data of polymer melts. Rheologica Acta, 1973, 12:269~275
  • 3[3]Liu TY, Soong DS, Williams MC. Time-dependent rheological properties and transient structural states of entangledpolymeric liquids--a kinetic network model. Polyn EngSci, 1981, 21:675~687
  • 4[4]Giacomin A J, Jeyaseelan RS, Samurkas T, Dealy JM. Validity of separable BKZ model for large amplitude oscillatory shear. J Rheol, 1993, 37(5): 811~826

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部