A paradigm for enhanced magnetorheological elastic materials is introduced and experimentally established. We show that a nonlinearly stiffening polymer matrix can be exploited to achieve anomalous magneto-elastomer stiffening exceeding standard magneto-elastomer theory and experiment in terms of percentage stiffness change and sensitivity to applied magnetic flux. Using a model system of a semiflexible fibrin network embedded with micron sized carbonyl iron particles, we demonstrate that even at a modest particle volume fraction (0.5–4%), a coupling between the magnetically interacting dipoles and a strain-stiffening polymer mesh provides previously unexplored opportunities for material design. Our experiments indicate that confined particles within the fibrin network internally tension and stiffen the polymer mesh when an external field is applied, resulting in a field-dependent stiffening response from the polymer mesh that superposes with the magnetic interparticle interactions.

中文翻译：

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利用非线性弹性进行异常磁响应加劲

介绍并实验建立了一种增强磁流变弹性材料的范例。我们表明，在刚度变化百分比和对施加磁通量的敏感性方面，可以利用非线性硬化聚合物基质来实现超过标准磁弹性体理论和实验的异常磁弹性体硬化。使用嵌入微米级羰基铁颗粒的半柔性纤维蛋白网络模型系统，我们证明即使在适度的颗粒体积分数（0.5-4%）下，磁相互作用偶极子和应变硬化聚合物网之间的耦合也提供了先前的材料设计的未开发机会。