Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed Structure
This paper presents a new constitutive model of high particles concentrated magnetorheological fluids (MRFs) that is based on the hexagonal close-packed structure, which can reflect the micro-structures of the particles under the magnetic field. Firstly, the particle dynamic simulations for the forc...
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MDPI AG
2020-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/13/7/1674 |
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| author | Jintao Zhang Wanli Song Zhen Peng Jinwei Gao Na Wang Seung-Bok Choi Gi-Woo Kim |
| author_facet | Jintao Zhang Wanli Song Zhen Peng Jinwei Gao Na Wang Seung-Bok Choi Gi-Woo Kim |
| author_sort | Jintao Zhang |
| collection | DOAJ |
| description | This paper presents a new constitutive model of high particles concentrated magnetorheological fluids (MRFs) that is based on the hexagonal close-packed structure, which can reflect the micro-structures of the particles under the magnetic field. Firstly, the particle dynamic simulations for the forces sustained by carbonyl iron powder (CIP) particles of MRFs are performed in order to investigate the particles chain-forming process at different time nodes. Subsequently, according to the force analyses, a hexagonal close-packed structure, which differs from the existing single-chain structure and body-cantered cubic structure, is adopted to formulate a constitutive model of MRFs with high concentration of the magnetic-responsive particles. Several experiments are performed while considering crucial factors that influence on the chain-forming mechanism and, hence, change the field-dependent shear yield stress in order to validate the proposed model. These factors include the magnetic induction intensity, volume fraction and radius of CIP particles, and surfactant coating thickness. It is shown that the proposed modeling approach can predict the field-dependent shear yield stress much better than the single-chain model. In addition, it is identified that the shear yield stress is increased as the particle volume fraction increases and surfactant coating thickness decreases. It is believed that the proposed constitutive model can be effectively used to estimate the field-dependent shear yield stress of MRFs with a high concentration of iron particles. |
| first_indexed | 2024-03-10T20:42:31Z |
| format | Article |
| id | doaj.art-fcab23f1a27a4fcf9367e057ba67154a |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T20:42:31Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-fcab23f1a27a4fcf9367e057ba67154a2023-11-19T20:38:28ZengMDPI AGMaterials1996-19442020-04-01137167410.3390/ma13071674Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed StructureJintao Zhang0Wanli Song1Zhen Peng2Jinwei Gao3Na Wang4Seung-Bok Choi5Gi-Woo Kim6School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110819, ChinaDepartment of Mechanical Engineering, Inha University, Incheon 22212, KoreaDepartment of Mechanical Engineering, Inha University, Incheon 22212, KoreaThis paper presents a new constitutive model of high particles concentrated magnetorheological fluids (MRFs) that is based on the hexagonal close-packed structure, which can reflect the micro-structures of the particles under the magnetic field. Firstly, the particle dynamic simulations for the forces sustained by carbonyl iron powder (CIP) particles of MRFs are performed in order to investigate the particles chain-forming process at different time nodes. Subsequently, according to the force analyses, a hexagonal close-packed structure, which differs from the existing single-chain structure and body-cantered cubic structure, is adopted to formulate a constitutive model of MRFs with high concentration of the magnetic-responsive particles. Several experiments are performed while considering crucial factors that influence on the chain-forming mechanism and, hence, change the field-dependent shear yield stress in order to validate the proposed model. These factors include the magnetic induction intensity, volume fraction and radius of CIP particles, and surfactant coating thickness. It is shown that the proposed modeling approach can predict the field-dependent shear yield stress much better than the single-chain model. In addition, it is identified that the shear yield stress is increased as the particle volume fraction increases and surfactant coating thickness decreases. It is believed that the proposed constitutive model can be effectively used to estimate the field-dependent shear yield stress of MRFs with a high concentration of iron particles.https://www.mdpi.com/1996-1944/13/7/1674microstructureparticle dynamics analysismagnetorheological fluidsconstitutive modelinghexagonal close-packed structure |
| spellingShingle | Jintao Zhang Wanli Song Zhen Peng Jinwei Gao Na Wang Seung-Bok Choi Gi-Woo Kim Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed Structure Materials microstructure particle dynamics analysis magnetorheological fluids constitutive modeling hexagonal close-packed structure |
| title | Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed Structure |
| title_full | Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed Structure |
| title_fullStr | Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed Structure |
| title_full_unstemmed | Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed Structure |
| title_short | Microstructure Simulation and Constitutive Modelling of Magnetorheological Fluids Based on the Hexagonal Close-packed Structure |
| title_sort | microstructure simulation and constitutive modelling of magnetorheological fluids based on the hexagonal close packed structure |
| topic | microstructure particle dynamics analysis magnetorheological fluids constitutive modeling hexagonal close-packed structure |
| url | https://www.mdpi.com/1996-1944/13/7/1674 |
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