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Magnetorheological elastomer composites: Modeling and dynamic finite element analysis

机译：磁流变弹性体复合材料：建模和动态有限元分析

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摘要

Magnetorheological elastomers (MREs) are polymers reinforced by ferromagnetic particles that show magnetic dependent behavior. Mixing MREs with reinforcing fibers can create a new class of material so-called "MRE composites, MRECs" with additional functionalities and properties. Here, using a Generalized Maxwell model, we proposed a new magnetic-dependent rheological model by considering the hysteresis phenomenon for MREs to predict the dynamic damping responses of MREC plates reinforced by fibers in the frequency domain. We also investigated the influence of magnetic flux intensity, the volume fraction of the fiber, the orientation angle of the fibers, the number of layers, as well as the fiber-to-matrix stiffness ratio on the natural frequency, loss factor, and mode shapes of MRECs plates. Our results suggest that homogenously increasing the elastic properties of the MRECs through the spatial distribution of fibers and changing the fiber-to-matrix stiffness ratio can effectively tailor the dynamic properties of MRECs. Tailoring these properties can provide additional freedom for the fabrication of 4D-printed MRE-based composites.
机译：磁流变弹性体（MRE）是由磁性依赖行为的铁磁性颗粒加固的聚合物。将MRS与增强纤维混合可以产生新的材料类别所谓的“MRE复合材料，MRCS”，具有额外的功能和性质。这里，使用广义的麦克斯韦模型，我们通过考虑MRES的滞后现象来预测频域中的纤维增强的MREC板的动态阻尼反应来提出新的磁依赖性流变学模型。我们还研究了磁通强度，纤维的体积分数，纤维的取向角，层数的影响，以及自然频率，损耗因子和模式的纤维到矩阵刚度比的影响。 MRECS板材的形状。我们的研究结果表明，通过纤维的空间分布均匀地增加MREC的弹性性能，并改变纤维 - 基质刚度比可以有效地定制MREC的动态性质。剪裁这些性能可以为制造4D印刷的MRE基复合材料提供额外的自由度。

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