Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress Experiments
The yielding behavior of two model electrorheological suspensions of uncoated silica particles and silica coated with polyaniline base in silicone oil using controlled shear rate and controlled shear stress experiments has been analyzed. The results demonstrate that unlike the uncertain dynamic yiel...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2006-02-01
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| Series: | Applied Rheology |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/arh-2006-0001 |
| _version_ | 1818736709125275648 |
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| author | Pavlínek Vladimír Sáha Petr Pérez-González José de Vargas Lourdes Stejskal Jaroslav Quadrat Otakar |
| author_facet | Pavlínek Vladimír Sáha Petr Pérez-González José de Vargas Lourdes Stejskal Jaroslav Quadrat Otakar |
| author_sort | Pavlínek Vladimír |
| collection | DOAJ |
| description | The yielding behavior of two model electrorheological suspensions of uncoated silica particles and silica coated with polyaniline base in silicone oil using controlled shear rate and controlled shear stress experiments has been analyzed. The results demonstrate that unlike the uncertain dynamic yield stress values estimated from the results obtained in the former mode by extrapolation of the unsteady shear stresses to zero shear rate, the controlled shear stress measurement permits to detect sensitively the region starting from the initial rupture of particle chain structure in the electric field at rest corresponding to a static yield stress τy and ending in total breakage of suspension structure at a breaking stress τb.. The latter quantity can be detected with a good accuracy and proved to be a reliable criterion of the stiffness of ER structure. |
| first_indexed | 2024-12-18T00:41:27Z |
| format | Article |
| id | doaj.art-cf473d24511a47318eac68763508543b |
| institution | Directory Open Access Journal |
| issn | 1617-8106 |
| language | English |
| last_indexed | 2024-12-18T00:41:27Z |
| publishDate | 2006-02-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Applied Rheology |
| spelling | doaj.art-cf473d24511a47318eac68763508543b2022-12-21T21:26:52ZengDe GruyterApplied Rheology1617-81062006-02-01161141810.1515/arh-2006-0001Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress ExperimentsPavlínek Vladimír0Sáha Petr1Pérez-González José2de Vargas Lourdes3Stejskal Jaroslav4Quadrat Otakar5Tomas Bata University in Zlín, Faculty of Technology, 762 72Zlín, Czech RepublicTomas Bata University in Zlín, Faculty of Technology, 762 72Zlín, Czech RepublicLaboratorio de Reología, Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, C.P. 07051, Apdo. Postal 118-354, México D.F., MexicoLaboratorio de Reología, Escuela Superior de Física y Matemáticas, Instituto Politécnico Nacional, C.P. 07051, Apdo. Postal 118-354, México D.F., MexicoInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06Prague 6, Czech RepublicInstitute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06Prague 6, Czech RepublicThe yielding behavior of two model electrorheological suspensions of uncoated silica particles and silica coated with polyaniline base in silicone oil using controlled shear rate and controlled shear stress experiments has been analyzed. The results demonstrate that unlike the uncertain dynamic yield stress values estimated from the results obtained in the former mode by extrapolation of the unsteady shear stresses to zero shear rate, the controlled shear stress measurement permits to detect sensitively the region starting from the initial rupture of particle chain structure in the electric field at rest corresponding to a static yield stress τy and ending in total breakage of suspension structure at a breaking stress τb.. The latter quantity can be detected with a good accuracy and proved to be a reliable criterion of the stiffness of ER structure.https://doi.org/10.1515/arh-2006-0001electrorheologyyield stresssuspensionspolyanilinesilica |
| spellingShingle | Pavlínek Vladimír Sáha Petr Pérez-González José de Vargas Lourdes Stejskal Jaroslav Quadrat Otakar Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress Experiments Applied Rheology electrorheology yield stress suspensions polyaniline silica |
| title | Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress Experiments |
| title_full | Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress Experiments |
| title_fullStr | Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress Experiments |
| title_full_unstemmed | Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress Experiments |
| title_short | Analysis of the Yielding Behavior of Electrorheological Suspensions by Controlled Shear Stress Experiments |
| title_sort | analysis of the yielding behavior of electrorheological suspensions by controlled shear stress experiments |
| topic | electrorheology yield stress suspensions polyaniline silica |
| url | https://doi.org/10.1515/arh-2006-0001 |
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