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Transient behavior of compressed magnetorheological brake excited by step currents. Sci Rep 2021; 11:12193. [PMID: 34108598 PMCID: PMC8190152 DOI: 10.1038/s41598-021-91836-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 06/01/2021] [Indexed: 11/23/2022] Open
Abstract
Transient behavior of a magnetorheological brake excited by step currents under compression-shear mode has been experimentally studied. The results show that the amplitude of the applied current had little effect on the rising time of transient torque, while the rising time was significantly affected by the rotational speed, the compressive speed and the compressive strain position. The falling time of transient torque was independent of the amplitude of the applied current, the compressive speed and the compressive strain position, and it was affected by the rotational speed. The falling time of the transient torque was much shorter than the rising time by a step current. The transient process of MR brake applied as a step current was different from a stable process pre-applied at constant current in different particle chain structure forming processes. In addition, the compressive processes applied in one step current and randomly on/off current were compared and experimentally verified: the particle chains in two processes both experienced the same evolutionary of transient torque. The results achieved in this study should be properly considered in the design and control of magnetorheological brake under compression-shear mode.
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Tanaka K, Robson S, Takasaki M, Kobayashi H, Nakano M, Totsuka A. Micro-gap flow behavior and micro-structure of stored electro-rheological nano-suspensions in the presence of sinusoidal electric field. Colloid Polym Sci 2017. [DOI: 10.1007/s00396-017-4020-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Simultaneous observations of microgap flow behavior and microstructure of electro-rheological nano-suspensions based on titanium dioxide nano-particles. Colloid Polym Sci 2015. [DOI: 10.1007/s00396-015-3638-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Development and micro-gap flow evaluation of electro-rheological nano-suspensions. Colloid Polym Sci 2013. [DOI: 10.1007/s00396-012-2849-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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An HN, Sun B, Picken SJ, Mendes E. Long Time Response of Soft Magnetorheological Gels. J Phys Chem B 2012; 116:4702-11. [DOI: 10.1021/jp301482a] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hai-Ning An
- Nanostructured Materials, Department
of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, 2628
BL Delft, The Netherlands
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Bin Sun
- Nanostructured Materials, Department
of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, 2628
BL Delft, The Netherlands
| | - Stephen J Picken
- Nanostructured Materials, Department
of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, 2628
BL Delft, The Netherlands
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
| | - Eduardo Mendes
- Nanostructured Materials, Department
of Chemical Engineering, Faculty of Applied Sciences, Delft University of Technology, Julianalaan 136, 2628
BL Delft, The Netherlands
- Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX Eindhoven, The Netherlands
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Tanaka K, Hira T, Fukui R, Nakagawa N, Akiyama R, Nakano M, Yoshida K, Tsujita T. Development and flow evaluation of electro-rheological nano-suspensions. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2396-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Tanaka K, Akiyama R. Electrically Induced Microstructures in Micro- and Nano-Suspensions and Related Physical Properties. Polym J 2009. [DOI: 10.1295/polymj.pj2009106r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Tian Y, Zeng H, Anderson TH, Zhao B, McGuiggan P, Israelachvili J. Transient filamentous network structure of a colloidal suspension excited by stepwise electric fields. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 75:011409. [PMID: 17358152 DOI: 10.1103/physreve.75.011409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2006] [Revised: 09/12/2006] [Indexed: 05/14/2023]
Abstract
Jamming and force networks observed in electrorheological (ER) fluids bear many similarities to those observed in various granular and colloidal systems. We have measured the time evolution (transient stresses) of filamentous networks of colloidal particles in suspensions subjected to continuous tensile strain concomitant with the switching on and off of electric fields. The density of particle chains was found to increase exponentially with the applied tensile strain via a rapid formation of single chains followed by a slower coarsening (aggregation) of the chains. The two processes can be ascribed to the field-induced short-range and long-range interparticle forces, respectively, along with the tensile viscous force.
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Affiliation(s)
- Yu Tian
- Department of Chemical Engineering, California NanoSystems Institute, University of California, Santa Barbara, California 93106, USA
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Tian Y, Zhang M, Meng Y, Wen S. Transient response of compressed electrorheological fluid. J Colloid Interface Sci 2006; 290:289-97. [PMID: 15935367 DOI: 10.1016/j.jcis.2005.04.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2005] [Revised: 04/07/2005] [Accepted: 04/09/2005] [Indexed: 12/01/2022]
Abstract
Transient behaviors of a compressed electrorheological (ER) fluid based on zeolite and silicone oil have been experimentally investigated. The ER fluid is purely compressed between two parallel plates. Compressive speed and voltage amplitude effects on the transient process and randomly applied on/off voltages have been studied. Through normalizing compressive stress of the ER fluid, the characteristic compressive strain and the response time constant corresponding to the rise of compressive stress have been fitted with exponential equations. Results show that the rising time of the transient compressive stress is greatly affected by the compressive speed and the compressive strain position applying voltages, while the amplitude of the applied voltage has little effect on the rising time. The obtained transient compressive strain for the compressive stress to rise to its stable value is much smaller than that working in the transient process of ER fluids under shearing. The decay time and decay strain of compressive stress are much less than for stress rising. The half decay compressive strain is as small as 0.0003 in the experiment. Results show that the response time of compressed ER fluids is quick enough for the usual working conditions of squeezing ER dampers.
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Affiliation(s)
- Yu Tian
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, People's Republic of China.
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Tian Y, Li C, Zhang M, Meng Y, Wen S. Transient response of an electrorheological fluid under square-wave electric field excitation. J Colloid Interface Sci 2006; 288:290-7. [PMID: 15927589 DOI: 10.1016/j.jcis.2005.02.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2004] [Revised: 01/12/2005] [Accepted: 02/20/2005] [Indexed: 10/25/2022]
Abstract
The transient process of an electrorheological (ER) fluid based on zeolite and silicone oil sheared between two parallel plates to which a square-wave electric field is applied has been experimentally studied. The transient shear stress response to the strain or time is tested. The characteristic constants of time under different applied electric fields and shear rates have been determined. The response time is found to be proportional to shear rate with an exponent of about -0.75 in the tested shear rate range, which agrees with the theoretical predictions made by others. But it only shows a small dependence on the strength of the applied electric field. The results show that the transient process of ER fluids is related to the structure formation in the shearing. When the required shear strain is reached, the shear stress rises to a stable value under constant electric field. Although the electric field strength greatly affects the yield strength, it shows little effect on the stress response time. Also, experiments showed the electric field-induced shear stress decreased with an increase of shear rate.
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Affiliation(s)
- Yu Tian
- State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, People's Republic of China.
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Tanaka K, Nakamura K, Akiyama R. Time scales for structural formation in an electrorheological suspension probed by optical and electrical responses. PHYSICAL REVIEW. E, STATISTICAL PHYSICS, PLASMAS, FLUIDS, AND RELATED INTERDISCIPLINARY TOPICS 2000; 62:5378-5382. [PMID: 11089099 DOI: 10.1103/physreve.62.5378] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2000] [Indexed: 05/23/2023]
Abstract
Responses of the diffuse transmitted light intensity and the current passing through an electrorheological suspension to the stepwise electric field were measured in the quiescent state, and the time scales for the structural formation of the polarized particles were reported. It was found experimentally that both of the responses consist of plural modes, the faster and slower modes even in the quiescent state. The optical response was also expressed as an exponential function with two modes, which take place in succession.
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Affiliation(s)
- K Tanaka
- Department of Polymer Science and Engineering, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan
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Tanaka K, Akiyama R, Takada K. Electro-Rheological Response of Anisotropic Solution of Poly(hexyl isocyanate) Measured by Parallel Plates Sliding Rheometer. Polym J 1996. [DOI: 10.1295/polymj.28.419] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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