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dc.contributor.authorElsaady, Wael; orcid: 0000-0002-4056-0809; email: wael.elsaady@mtc.edu.eg; email: wael.abdelmoneamelsaady@manchester.ac.uk
dc.contributor.authorOyadiji, S Olutunde; orcid: 0000-0002-5814-8441
dc.contributor.authorNasser, Adel
dc.date.accessioned2021-09-08T17:16:34Z
dc.date.available2021-09-08T17:16:34Z
dc.date.issued2020-11-03
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625807/10.1177_1045389X20969837.xml?sequence=2
dc.identifierhttps://chesterrep.openrepository.com/bitstream/handle/10034/625807/10.1177_1045389X20969837.pdf?sequence=3
dc.identifier.citationJournal of Intelligent Material Systems and Structures, volume 32, issue 13, page 1391-1419
dc.identifier.urihttp://hdl.handle.net/10034/625807
dc.descriptionFrom SAGE Publishing via Jisc Publications Router
dc.descriptionHistory: epub 2020-11-03
dc.descriptionPublication status: Published
dc.description.abstractA new magnetorheological (MR) damper has been designed, manufactured, modelled and tested under cyclic loads. A faulty behaviour of the damper was accidentally detected during the experiments. It was deduced that the presence of air bubbles within the MR fluid is the main reason for that failure mode of the damper. The AMT-Smartec+ MR fluid used in the current study, a new MR fluid whose characteristics are not available in the literature, exhibits good magnetic properties. However, the fluid has a very high viscosity in the absence of magnetic field. It is assumed that this high viscosity enables the retention of air bubbles in the damper and causes the faulty behaviour. To prove this assumption, a coupled numerical approach has been developed. The approach incorporates a Finite Element Analysis (FEA) of the magnetic circuit and a Computational Fluid Dynamics (CFD) analysis of the fluid flow. A similar approach was presented in a previous publication in which an ideal behaviour of an MR damper (no effect of air bubbles) was investigated. The model has been modified in the current study to include the effect of air bubbles. The results were found to support the assumptions for the reasons of the failure symptoms of the current MR damper. The results are shown in a comparative way between the former and current studies to show the differences in flow parameters, namely: pressure, velocity and viscosity, in the faultless and faulty modes. The results indicate that the presence of air bubbles in MR dampers reduces the damper force considerably. Therefore, the effect of the high yield stress of MR fluids due to the magnetic field is reduced.
dc.languageen
dc.publisherSAGE Publications
dc.rightsLicence for this article starting on 2020-11-03: https://creativecommons.org/licenses/by-nc/4.0/
dc.rightsEmbargo: ends 2020-11-03
dc.sourcepissn: 1045-389X
dc.sourceeissn: 1530-8138
dc.subjectSpecial Issue Articles
dc.subjectMR fluids
dc.subjectMR dampers
dc.subjectfinite element analysis
dc.subjectcomputational fluid dynamics
dc.subjectrheology
dc.subjectbubbly flow
dc.titleStudy of failure symptoms of a single-tube MR damper using an FEA-CFD approach
dc.typearticle
dc.date.updated2021-09-08T17:16:34Z


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