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Field-dependent rheological properties of magnetorheological elastomer with fountain-like particle chain alignment

Muhammad Fakhree, Muhammad Akif and Nordin, Nur Azmah and Nazmi, Nurhazimah and Mazlan, Saiful Amri and Abdul Aziz, Siti Aishah and Ubaidillah, Ubaidillah and Ahmad, Fauzan and Choi, Seung Bok (2022) Field-dependent rheological properties of magnetorheological elastomer with fountain-like particle chain alignment. Micromachines, 13 (4). pp. 1-19. ISSN 2072-666X

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Official URL: http://dx.doi.org/10.3390/mi13040492

Abstract

Magnetorheological elastomer (MRE) consists of magnetic particles known as carbonyl iron (CIPs), which have been locked in a silicone-based matrix, in various alignments. However, current MRE exhibits inadequate rheological properties due to several issues such as particle alignments. Therefore, in this study, a new approach of the particle alignment of CIPs in MRE, namely fountain-like structure, is introduced. It is expected that this kind of MRE exhibits enhancement rheological responses, in off-and on-state conditions. This work includes the development of a new mold that can produce various directions of magnetic flux lines in order to have fountain-like structures of CIPs in MRE, during the curing process. Three types of particle alignments in MRE, namely isotropic, fountain-like and inverted fountain-like, are fabricated. The rheological properties of MRE in terms of storage modulus and MR effect are measured in an oscillatory shear mode using a rheometer. The results have revealed that fountain-like MRE exhibits higher storage modulus than the isotropic MRE, approximately 0.6 MPa of increment in the strain sweep test, in an on-state condition. Furthermore, it has been demonstrated from strain, frequency and the current sweep test that the rheological properties of fountain-like MRE related to storage modulus and magnetorheological (MR) effect are higher compared to the inverted fountain-like MRE.

Item Type:Article
Uncontrolled Keywords:fountain-like alignment, magnetorheological elastomer, MR effect, shear stress direction, storage modulus
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:103296
Deposited By: Yanti Mohd Shah
Deposited On:31 Oct 2023 01:41
Last Modified:31 Oct 2023 01:41

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