Two-phase shear band structures at uniform stress
Two-phase shear band structures at uniform stress
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DOI：
10.1103/physrevlett.78.4930
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发表时间：
1997-06-30
影响因子：
8.6
通讯作者：
Callaghan, PT
中科院分区：
文献类型：
--
作者：
Britton, MM;Callaghan, PT
使用NMR显微镜，我们测量了蠕虫状表面活性剂溶液在小角度锥板流变仪的差距中的速度分布。该体系，十六烷基氯化吡啶/水杨酸钠100 mM/60 mM，当施加的剪切速率超过临界应变速率时，表现出双相剪切带结构，超过该临界应变速率，在剪切应力中观察到平台。该结构的特点是由两个低/高剪切界面和高剪切区的发展，增加宽度的平均间隙剪切增加。
Using NMR microscopy we measure the velocity distribution for a wormlike surfactant solution in the gap of a small angle cone-and-plate rheometer, This system, cetylpyridinium chloride/sodium salicylate 100 mM/60 mM, exhibits biphasic shear band structure when the applied shear rate exceeds the critical rate of strain beyond which a plateau is observed in the shear stress. The structure is characterized by two low/high shear interfaces and the region of high shear evolves by increasing width as the average gap shear is increased.