Dynamic mechanical behaviour of the magneto-sensitive elastomers in a homogeneous magnetic field

磁敏弹性体（MSE）是一类相对较新的功能高分子材料，其形状和机械性能可以在施加磁场时容易地改变。MSE由分散在弹性体基质中的微米级铁颗粒组成。在过去的几年中，磁致变形的MSE已成功地进行了实验和理论研究。 另一方面，只有几个微观的方法来描述静态MSE模量。申请人不知道用于描述在施加磁场下的动态机械模量的任何微观模型。然而，了解此类材料的动态性能对于其多种技术应用极其重要，其中外部机械载荷取决于振幅和频率。该项目的目的是开发并验证第一种用于描述的微观方法。在均匀磁场的作用下，微机电系统的动态机械性能。将使用简单的立方网络模型来描述矩阵特性。为了考虑磁性粒子的不同空间分布，将使用我们以前研究中考虑的一些晶格模型以及随机生成的分布。计划研究在低频和中频下具有各向同性和各向异性颗粒分布的MSE的动态行为，并将其与实验结果进行比较。

Magneto-sensitive elastomers (MSE) is a relatively new class of functional polymer materials, the shape and mechanical properties of which can be easily changed upon application of a magnetic field. MSEs consist of micron-sized iron particles dispersed within an elastomeric matrix. In the last years the magneto-induced deformation of the MSEs has been studied successfully experimentally and theoretically. On the other side, there are only a few microscopic approaches for description of the static MSE moduli. The applicants do not know any microscopic models for description of the dynamic-mechanical moduli under application of a magnetic field. Understanding of the dynamic properties of this class of materials is however extremely important for their multiple technical applications, in which the external mechanical loading depends on the amplitude and frequency.The aim of this project is to develop and to validate a first microscopic approach for description of dynamic mechanical properties of the MSEs under application of a homogeneous magnetic field. The matrix properties will be described using a simple cubic network model. To consider different spatial distributions of magnetic particles, a number of lattice models considered in our previous studies as well as stochastically generated distributions will be used. It is planned to investigate the dynamic behavior of the MSEs with isotropic and anisotropic particle distributions at low and intermediate frequencies and to compare it with experimental findings.