磁敏高弹体的力-磁-热耦合行为及其对介电效应的影响

Magnetorheological elastomers (MREs) are a new kind of smart materials, which are composite materials consisting of magnetizable particles embedded in an elastomeric matrix material. Such materials have abilities of altering their mechanical properties under the action of an applied magnetic field. To efficiently control MRE devices, an accurate description of the relations between the input and the output of devices, is essential. Since the mechanical behavior of MREs will change with the applied magnetic field and working temperature, A model that can capture the magneto-thermo-mechanical coupling of the constitutive relations is necessary.The purpose of this project is to model the magneto-thermo-mechanical coupling characteristic inherent to MREs based on a micromechanical model. After that, the magneto-thermo-mechanical coupled dielectric effects in MREs are studied both by experiment and modeling. The predicted results by the model will be of significant benefit to both the theoretical researches and the application of MRE smart structures and systems.

磁敏高弹体是一类新型磁控智能材料，通过将微、纳磁敏颗粒嵌入高弹基体中制备而得，材料的力学性质可以通过磁场进行调节。对于各种采用磁敏高弹体的智能器件来说，定量预测力学与磁学输入量与输出量之间的关系是优化器件性能的前提，所以研究磁敏高弹体的本构关系是非常重要的。然而磁敏高弹体具有复杂的力-磁-热耦合机制，在多物理场作用（应力、磁场、温度）下磁敏颗粒在高弹基体中的空间分布是建模的难点。本项目拟针对磁敏高弹体的力-磁-热耦合机制展开研究，建立微力学模型计算材料在多物理场下微结构的变化，给出材料的力-磁-热耦合的本构关系，在此基础上对材料在多物理场下的介电效应进行实验测量和理论建模，分析材料的力-磁-热耦合行为对介电效应的影响。

磁敏高弹体是一类新型磁控智能材料，通过将微、纳磁敏颗粒嵌入高弹基体中制备而得，材料的力学性质可以通过磁场进行调节。对于各种采用磁敏高弹体的智能器件来说，定量预测力学与磁学输入量与输出量之间的关系是优化器件性能的前提，所以研究磁敏高弹体的本构关系是非常重要的。然而磁敏高弹体具有复杂的力-磁-热耦合机制，在多物理场作用（应力、磁场、温度）下磁敏颗粒在高弹基体中的空间分布是建模的难点。本项目针对磁敏高弹体的力-磁-热耦合机制展开研究，建立微力学模型计算材料在多物理场下微结构的变化，给出材料的本构关系，在此基础上对材料在多物理场下力学进行实验测量和理论建模，分析材料的力-磁-热耦合行为和介电效应。