2-PHASE SHEAR-BAND STRUCTURES AT UNIFORM STRESS

Citation
Mm. Britton et Pt. Callaghan, 2-PHASE SHEAR-BAND STRUCTURES AT UNIFORM STRESS, Physical review letters, 78(26), 1997, pp. 4930-4933
Citations number
15
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
78
Issue
26
Year of publication
1997
Pages
4930 - 4933
Database
ISI
SICI code
0031-9007(1997)78:26<4930:2SSAUS>2.0.ZU;2-Z
Abstract
Using NMR microscopy we measure the velocity distribution for a wormli ke surfactant solution in the gap of a small angle cone-and-plate rheo meter, This system, cetylpyridinium chloride/sodium salicylate 100 mM/ 60 mM, exhibits biphasic shear band structure when the applied shear r ate exceeds the critical rate of strain beyond which a plateau is obse rved in the shear stress. The structure is characterized by two low/hi gh shear interfaces and the region of high shear evolves by increasing width as the average gap shear is increased.