Microstructure-Based Multi-Physics Characterisation and Modelling of Magnetorheological Elastomers

基于微结构的磁流变弹性体多物理场表征和建模

• 批准号: EP/H016619/3
• 负责人: Philip Harrison
• 金额: $ 3.74万
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2012
• 资助国家: 英国
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FH016619%2F3
• 关键词: Microstructure; Based; Multi; Physics; Characterisation

Magnetorheological elastomers (MREs) are multi-phase, multi-functional composite materials with magnetisable particles suspended in a non-magnetic elastomer solid. The mechanical properties of MREs can be reversibly changed and controlled almost instantaneously by altering an externally applied magnetic field. For this reason MREs are regarded as a class of smart materials and hold promise in many industrial applications (e.g., adaptive tuned vibration absorbers, stiffness tuneable mounts, and artificial muscles). However, a generalised constitutive model for MREs is lacking due to the difficulties to model precisely MREs' nonlinear and anisotropic behaviour (including the nonlinear ferroelectric properties of the particles, the nonlinear mechanical response of the matrix, and the anisotropy caused by the material microstructure and the external magnetic field), making it currently difficult to simulate and optimise the design of MRE applications in a virtual environment. Given the importance of computer aided engineering in today's design methodology, this is clearly a significant obstacle preventing widespread exploitation of MREs. Furthermore, a fundamental understanding of the relationship between microstructure and macroscale behaviour in MREs is essential before improving and tailoring MREs for a specific application can be achieved. This project is concerned with modelling and characterisation of the magnetomechanical behaviour of MREs in the finite deformation regime in order to ultimately understand the structure-property relation of MREs. The goal is to develop the first realistic microstructure-based macroscale magnetomechanical constitutive model for MREs via homogenisation of the multi-physics simulation of representative volume element (RVE) model at the microscale.In the proposed research, true 3D microstructures of various MRE materials will be obtained by MicroCT to develop computational magnetomechanical RVE models of MREs. Macroscale complete magnetomechanical constitutive models will be derived and calibrated through homogenisation of the RVE models. Comprehensive experiments will be implemented and the measured microscale deformation (via MicroCT) and macroscale (homogenised) deformation (via Digital Image Correlation (DIC) system) will be employed to verify the developed microstructure-based RVE models and macroscale models respectively. The models will then be applied to a real engineering problem, the design optimisation of the MRE rubber air springs.This project hinges upon a unique combination of analytical, numerical and experimental work and it will deliver (i) magnetomechanical experimental protocols for MRE materials; (ii) microstructure-based RVE models for MRE materials; (iii) a multi-physics nonlinear FEM solver for magnetomechanical problems; and (iv) a general macroscale constitutive modelling framework applicable to any multi-physics phenomena. The successful outcome of this project will have significant direct impact on both industrial and academic communities.

磁性弹性体（MRES）是多功能的多功能复合材料，具有悬浮在非磁性弹性体固体中的磁性颗粒。 MRE的机械性能可以通过改变外部施加的磁场来可逆地更改和控制。因此，MRE被视为一类智能材料，并在许多工业应用中保持承诺（例如，自适应调谐振动器，可调式固定式坐骑和人造肌肉）。然而，由于难以模拟精确的MRES非线性和各向异性行为（包括粒子的非线性铁电特性，矩阵的非线性铁电特性，矩阵的非线性机械响应，以及由材料微观结构和外部磁场引起的各种环境，因此，将其用于模拟的环境，因此缺乏MIRS的广义本构模型（包括粒子的非线性铁电特性，矩阵的非线性机械响应，以及一个fimallial and Unlial and Unial and Unial ins and Inalial and and and and ofiration and and ofiral and and ofiral，因此缺乏MRRE的广义组成模型。鉴于计算机辅助工程在当今的设计方法中的重要性，这显然是一个重要的障碍，阻止了对MRE的广泛开发。此外，在改善和量身定制MRE以实现特定应用之前，对微观结构与宏观行为之间的关系的基本理解是必不可少的。该项目与有限变形方案中MRE的磁力学行为的建模和表征有关，以最终了解MRES的结构 - 繁星关系。目的是通过Microscale的多物理模拟对代表体积元素（RVE）模型的均质化来开发首个基于微观结构的宏观机械组成模型，用于MICROSCALE。在拟议的研究中，将通过Microct开发Microct来开发计算Magnetologe Mochanical Modical Models M.Res Res Res Ress的真实3D微观结构。宏观的完整磁力学组成型模型将通过RVE模型的均匀化来得出和校准。将实施全面的实验，并将使用测量的显微镜变形（通过MicroCT）和宏观（通过数字图像相关（DIC）系统）分别验证开发的基于微观的RVE模型和宏观科学模型。然后将模型应用于实际工程问题，即MRE橡胶气弹簧的设计优化。该项目取决于分析，数值和实验性工作的独特组合，并将提供（I）MRE材料的磁力学实验方案； （ii）基于微结构的MRE材料的RVE模型； （iii）用于磁力机械问题的多物理非线性FEM求解器； （iv）适用于任何多物理现象的一般宏观组成型建模框架。该项目的成功结果将对工业和学术社区产生重大影响。

项目成果

Equi-biaxial tension tests on magneto-rheological elastomers

• DOI: 10.1088/0964-1726/25/1/015015
• 发表时间: 2015
• 期刊: Smart Materials and Structures
• 影响因子: 4.1
• 作者: G. Schubert;P. Harrison

Mechanical modeling of incompressible particle-reinforced neo-Hookean composites based on numerical homogenization

基于数值均匀化的不可压缩颗粒增强新胡克复合材料的力学建模

• DOI: 10.1016/j.mechmat.2013.11.004
• 发表时间: 2014-03
• 期刊: mechanics of materials
• 影响因子: 3.9
• 作者: Yang Chen;Huapeng Chen;Xiongqi Peng;Philip Harrison
• 通讯作者: Philip Harrison

Magnetic induction measurements and identification of the permeability of Magneto-Rheological Elastomers using finite element simulations

• DOI: 10.1016/j.jmmm.2015.12.003
• 发表时间: 2016-04-15
• 期刊: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
• 影响因子: 2.7
• 作者: Schubert, Gerlind;Harrison, Philip
• 通讯作者: Harrison, Philip

The behaviour of magneto-rheological elastomers under equi-biaxial tension

磁流变弹性体在等双轴拉伸下的行为

• 发表时间: 2013
• 期刊: 19th International Conference on Composite Materials, 28 Jul - 2 Aug 2013, Montreal, Canada.
• 作者: Schubert, G.